During my leveling as a Sage in TOR (with qyzen fess as my tank), I've died rather often. I don't know if I can call up a statistic on it, but I'd say about 4-5 times on every planet so far (I'm starting Balmorra now, so just finished with act 1) on average. Weirdly enough, though, I die more often on groups of mobs than on the bosses that you fight at the end of questlines.
However, contrary to WoW, where I find death really annoying, but am often forced into death because of groups, I actually don't mind dying in TOR. Because, If I die in WoW, it's often not my fault, because I avoid fire and other death-inducing mechanics as best I can. Which means that if I die in WoW, I mostly die because someone else messed up, OR because some alliance aggressor decided he didn't like me, because I foolishly decided to play on a PvP server.
However, I approach TOR as a singleplayer game with some multiplayer elements. Which basically boils down to "I play solo and avoid multiplayer content until maximum level". I also rolled on a PvE server instead of a PvP server. This means that I cannot die because someone else messed up, and I cannot die because someone from the opposing faction disliked me. This just leaves that I messed up in some way. And i can deal with that. Because it means that if I treated stuff differently, I could have survived. It means that I'm not performing to my best. Which in turn means that I got room for improvement. And that's what I like to hear: that my class still has secret tricks for me. And that the game is not afraid to show me in a brutal way.
So, how do you feel about dying in TOR?