With the other MMO's I've played I always compared them to CoH (Legacy or HC, doesn't matter) and always found them lacking CoH's QoL features. Sidekicking/exemplaring was probably one of the biggest ones, want to join your friends on any character? Go for it.
So many times whilst I was playing DDO with a friend, DDO's mechanics or poor design left me saying "That's so stupid", so much so that I just starting saying "That's so DDO."
Played New World for a bit, it's very pretty but there was nothing that kept my attention. Having story arcs ending in missions that require a set number of players? Fail.
I don't care to mention the others as I'm gonna go play a 20yo, dead, niche game now.