I managed to get a lot of mounts so my list is short, here it is:
Blazing Drake
Zereth Overseer
Marrowfang
There are 3 mounts from legion that I need, but I don’t care if I get them or not since legion remix is around the corner. By that I mean inside 18 months or so, that is just a guess.
Please refrain from using the word “working” as it’s a potential trigger word for those of the community that may not be able to “work”
As a reminder this place is meant to foster safety and inclusiveness and we should work diligently to remove language that goes against that!
Thank you.
I’ve gotten Ashes, GMOD, Jania’s water elemental, Charhound, ZG raptor, ZG panther, the fel-machine from Fel citadel in WoD, Sharkbait, zombie raptor from kings rest, and maybe one or two more I’m forgetting.
I’m still trying to get Mimi’s Head. And still trying to get midnight.
I’ve also gotten the MH Warglaive of Azz, so hopefully I can get the OH before the event ends >.>
ETA - the one I was forgetting was the Azure Drake from WotlK
I think the last one I’m working on is the raptor from Kings Rest.
Not really on the original list but of my ‘before S3 goals’. But all I have left on the list is:
So I’m getting the last visually beautiful mount done. Then I might go back to get some armor sets too while the bonus is on.
Last one I need/want: Sanctum Gloomcharger
I was going “0 fer” this week and last nights I got both infernals from Nighthold. (Red one first!)
4 mounts still on the list. Jaina, Gmod and the 2 from Dragonsoul. Handmaiden and Experiment 12b and Azure Drake from eoe.
Natalie Portman?
All of them. I’ve only picked up two that I were not on my list.
Amirdrassil owl.
Same ones as always:
Saddles… 11 of them. That’s going to take awhile, because one can only handle so much Blitz, haha.
Off in the distance, I see the 500 honor level courser. With how slow I accumulate honor levels, that will take me 4-6 months to get.
I have several I will still go for, but the only one I will be annoyed if I don’t get it, is the Blazing Drake. It’s the last one I need to get the Emerald Drake reward from the “Awake the Drakes” achievement.
Nylotha and eternal palace shoulders
Oh, you know, this mount, that mount… Only one I obtained this week is the Solar Spirehawk. Mounts from the Firelands (The Smoldering thingy) and Nightmare have been a real pain to get. They just don’t drop!
Something warlocky or demon huntery. Any ideas?
Mimirons Head. 12 characters running as often as allowed added to the 15 years before that. I hope this thing finally drops. I have every NPC voice line in that raid memorized. I’ve whittled it down to 27 minutes per run, but I’m just so tired of going there. In another thread I even offered blizzard $10,000 to just mail it to me. 
Well, thanks to Collector’s Bounty, my to-do list is just whichever things I’m missing that have a buffed drop rate now. Those’d be the Hellfire Infernal, G.M.O.D., Tomb Stalker, Underrot Crawg, Ny’alotha Allseer, Marrowfang, Sanctum Gloomcharger, and Vengeance. Plus the Golden Hearthstone Card: Lord Jaraxxus.
I got Sharkbait and the Glacial Tidestorm the first week, but I’ve been dry since. Hopefully at least one more of these things pops up before the end of the event. If I got to pick one, it’d be G.M.O.D. so I can say goodbye to the long Dazar’alor runs. 
But even if not, I can’t complain since I still checked two things off the collection list. 
Most of them. I got my baron charger and I stopped looking
All of them. Havent had 1 drop. 5% really hates me.
My main goals for the event were Blazing Drake and Invincible, just due to the amount of time I’ve spent over the years farming. Any others would be for fun.
Well, I’ve gotten ten mounts, including Invincible. Now I just need Blazing to drop.
I’ve had three Handmaidens and an Experiment 12-B drop just during the event, none of which I needed.
Blazing is really testing my patience.