I am one of those who has tried other games, specifically WoW and DAoC. While there were elements of each that I enjoyed, WoW's Auction House and DAoC's overall feel, I came back to EQ. For each thing I liked about one of the other games, and granted I really only spent a few hours (real time) on each, I found many more things that made me miss EQ. In fact, my short time on Wow, for some reason, made me give up on-line gaming entirely for a few months.
Anyway, I do tend to leave gaming for month on end only to return with a fresh outlook. I nearly always start completely over on a new server with zero plat and no twinking. This has given me a perspective on EQ that I would not get otherwise--that of a brand new player, albeit with a little headstart in knowledge.
I have found, on each server, folks who are helpful and kind. Sure, there are a butthead or ten out there, but as the population has diminished, they seem to have either gotten nicer or fewer in number. I have gotten more free temps, free V, free everything than I had in the old days. Maybe this is because 10 plat for a peridot is not such a big thing anymore, but to a fresh, untwinked and plat-poor toon who generally offers to donate between 20 plat (when new) and 50 plat when I have it, that free temp means the world.
Sure there are people on WoW and other games which might be just as nice, but I KNOW they exist on EQ. That is why I always keep coming back.