I stick to the campaign because that will unlock things faster. While also occasionally doing dungeons. My first character is always my quester. Then any other characters will dungeon grind, because everything has already been unlocked by my main.
I will usually do the side quests, while dungeon grinding just to see what is going on, while leveling alts.
Main toon I mostly quest, and try to do each new dungeon. Alts I mostly dungeon spam, but will also quest in areas I need to. Like many of my alts are questing in Azj-Kahet in-between dungeons since I need kej currency.
I normally level by filling up the experience bar until it can no longer be filled up. Then I do it all again 2 years later.
you do dungeons to level!, oh wait, it got nerfed today.
I complete the campaign and the side quests in the zone before I go to the next one.
Questing on my first toon in any expansion. I do all available quests I can find in any zone before progressing to another and spend a little bit of time simply trying to unlock all the named areas that might give discovery experience.
First run-through? All quests in each zone before moving on. Probably picking flowers (my main is herb/alc) which provides some exp and lets me work a little on professions. I try to do the dungeons (and now delves) as they become part of the flow of the story and will usually do them before I leave a zone. Iāll also go after any treasure I see.
However, trying to do all the side-quests before the main has made it challenging to avoid story spoilers (why am I even here?!?) as others blaze through and give away plot details in their forum subjects and video titles. So I may switch that up a bit and do main quests first then side. FTR, Ringing Deep has a LOT of side quests and Iāve been down there for days, most involving kobolds and candles. Which I donāt mind, but hey, whereās my poop quest? Blizz? I hope thereās a poop questā¦ earwax wonāt cut it!
Anyway, that, yes. Alts will do main quest and then go back and do side while spam queuing dungeons (Iām mostly DPS so thereās always a wait.)
Completed the campaign then finished to 80 with dungeons on my first two; then my third I did a couple levels accidently with profession crafting, then went on to grind the RDF to 80. The RDF was surprisingly fast, donāt know what the nerf will do to it, but Iām gonna try it again this evening I think.
I clear every zone as much as possible before moving on. My first toon through is always my feral druid so I can sneak past a lot of junk on the way to quest objectives. I track down every herb in sight and fish quite a bit (now at lvl 160) to break things up. Hit level 80 just as I was sticking my toes into Hallowfall.
I did three delves and decided I didnāt like them, so those quests will be on my map for a while I guess. I should finish the campaign and the last zone today. Looking forward to what daily quests will look like.
No poop questsā¦ So far. Thereās spider vomit(pheromones) will that do?
I have been doing the campaign plus the side quests for my first toon. For my next one, Iāll probably level up with just the campaign.
It would be the first expansion without a poop quest. This cannot stand! #NoChanges 
I suppose Iāll survive somehow!
I just mainlined the campaign and dungeon grinded to max level. Might do the side quests later as the mood strikes me.
I clear entire quests and become around 76.5~77. do a bit more in the next zone become 80 but last 3 levels are slow a bit. the reason each characters clear every area i chose because of the quest rewards do some good tmogs
I finished the campaign in each region and exploration to get the pathfinder achievement so I could have static flying on all my alts. I also wanted to unlock world quests for better rep grinding with alts. Iāll be levelling my alts via dungeons most likely as that is the fastest way, then I will go back and do the side quests and rest of the unlocked campaign once I am happy with the number of toons I have at 80.
First char : Main campaign, few dungeons, delves and battlegrounds.
Second char : Gathering and a few dungeons, no quests
Iāll do the side quest later on my main.
Main campaing and dungeons, mostly.
At the start of any new expansion, the first thing I do is find the fishing trainer, pick up the new fishing skill, and find the nearest body of water. Most of the time, I fish there until I have max fishing before heading out to do the main story. Players who donāt fish or donāt like to fish will get very different mileage out of that than I do. ha ha
When leveling, I donāt touch the dungeons unless the main campaign requires me to for continuing to the next quest. I do the main story and only the main story until itās complete (even if I hit max level before itās over). While working on that, I pick every single herb I see. I read every quest. I listen to every āstay awhile and listen.ā I pick up every flight point. I take my time, look through all the vendor inventories, and justā¦enjoy it.
Here in TWW, I hit 80 halfway through Hallowfallās questline. The built up rested XP coupled with continuous herb picking almost always does the trick. I canāt remember ever having to use side quests to finish leveling in modern, post-Wrath WoW.
I avoid side questing until Iām done with the main story for a couple of reasons:
First, I like following the campaign through to the end. Side quests send you everywhere and overlap with other zones or make you travel back and forth too much. I find itās too many characters and too many overlapping stories for me to stay engaged with it.
Second, a lot of end game content is usually gated behind the campaign completion achievement, so getting the main story done first is just more efficient and convenient in the long run.
Third, I find that it helps me learn the layout of the map. I do everything I can on a ground mount, and DF was the lone exception. Even in TWW, I did the majority of the original quest line on foot or a ground mount. It helps me get a feel for where stuff is.
Finally, quests give more gold once you hit level cap. When there is no XP bonus, they add more gold to the reward. I like to save as many quests as possible for the gold infusion you get from being a āloreā completionist about side quests after leveling is finished.
When we start a new expansion, we have weeks and weeks to take our time with all of the side quests and stories and treasure hunts, etc. I like to get leveled, get a gear plan for the new raid tier, and then do the rest at my leisure.
Gathering, primarily
I level with a combination of farming ores, herbs, doing side quests while waiting for a dungeon queue to pop.
I do a little bit of every thing.