When SWTOR first came out, I hated it. I remember there being severe lag and/or graphics performance issues. I can't remember if it was the game at the time, or if my system just couldn't handle it. I hated how single-tracked it was as far as the quest line. But the idea of the Sith and the classes always kept pulling at me, as I'm a huge Star Wars fan. I've always hated questing, but I've found that you can really keep your level on target by just doing your class quest line along with flashpoints. There is so much to do, and the classes are fun to me. Class stories vary in levels of fun, but overall I'm quite happy with everything they've added over the years. There are always people on, and almost all areas are populated.
I've seen the negative posts about the game and the hate for the devs, but if you like Star Wars, it's pretty fun. That being said it would be great to see a new Star Wars mmo sometime eventually as well.
"God, please help us sinful children of Ivalice.."