Liking any MMO simply comes down to 1 thing, do you have RL friends playing or/and are willing to spend some time looking for like minded players who you can befriend and group with? If the answer is no and you just in it for your own personal experience/exploration/questing etc. then you will find ANY MMO 'boring' eventually, no matter how good it looks or how polished it is. Without a willingness and a time commitment to get socially involved with a small group of people that you enjoy playing with, you are wasting your time playing any MMO.
This is the only reason I have played any online game since the days of MUDs, Subspace, Asheron's Call, Planetside (and many more in between) and now Rift. I enjoy it because I have several RL friends playing online and we always try to get together for groups/quests or just help each other out, learning/dying and exploring the game along the way. If they left, I would stop playing it, like I have done many time in the past, the appeal to play by myself, for myself, just is not there.
The single greatest quality of Rift, if I had to compare it to all the other MMO's I have played, is the ability of classes not be restricted to their roles. In other words, a Cleric does not just have to be a healer, it can be a tank or a melee DPS or ranged DPS, same goes for all the other classes. This allows for much more flexibility when playing with a small group of friends plus it great just having one character (esp if you are time limited per day or per week) but it can play different roles, certainly adds a bit more spice in my online gaming.
For the above 2 reasons is why I enjoy playing Rift, at least till we all move to the next big thing

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btw we all came from LOTRO & Warhammer and we felt that Rift was a nice sorta mixture of the two, well polished (for a brand new MMO), nice GFX, the solo quests are pretty linear and a bit of a grind but most of the group/dungeon quests IMO have been great plus the invasions and rifts add a nice change of pace from the normal MMO routine.