Also, WoW is not a real role playing game (don’t think I’ve ever seen somebody try being in-character), but when playing DAoC, I just knew it would ruin the game for me. I never used teamspeak, but as soon as everyone else did, most of them stopped any attempt at roleplaying.
Mind you, only few people role-played to begin with, so teamspeak even converted the most real roleplayers

Actually, I’ve always sort of hated Voice Chat, except in Raid situations. Unlike most people who shorten their speech in text to the point where it becomes a single gigantic acronym, I find I can better articulate what I’m thinking and what I really want to say when I type it out. Although I don’t technically stutter IRL, I have a chronic case of hoof-in-mouth syndrome; the second my mouth opens, it’s only a few seconds before I start tripping over words and finally say something so stupid I shut up for the rest of the conversation. In text, I can think about what I want to say before I say it, pick the right words instead of just using the next-best alternative that pops into my mind first, and altogether get my point across much more efficiently.

Of course, the unfortunate side effect is the occasional ungodly-wall-o-text, as seen here, but I’ve mastered the art of splitting it into readable chunks in-game, so not too many people need TL;DRs XP