Technically, I too, am picking covenant based or aesthetics and roleplay. Just so happens that Night Fae is thematically perfect for worgen druid [and my bm hunter] and the ability is beast.
For the rest of my alts, assuming I have the will to run through the maw eight more times, I will definitely be picking based on roleplay or transmog. The abilities are nice but I’m not a min/maxer, and I personally prefer the roleplay value more.
That said, I still haven’t chosen for many of my alts. My priest would like Kyrian but would abhor the thought of purging her past self so I was thinking maybe Venthyr, as helping those atone would be kinda neat rp. Many other alts but I won’t make this longer than it is. Just wanted to agree that aesthetics over ability is my preference too 