I think the best hope for SW: TOR is that it plays like a co-op version of Kotor, and you can ignore the tacked on MMO features (ie, the pvp sounds like a poorly realised afterthought). If you can find a solid group of 4 to go through all of the content, I think there could be a good time there (or maybe I'm clutching at straws).
I played Rift shortly after launch and although polished, with a couple of clever features, it was still essentially the same as every other MMO on the market. If you really like MMO's then you'll probably enjoy it, if like me you're waiting for an mmo to break the mold and actually be 'fun' on a moment-to-moment basis, Rift isn't the one.
I really hope GW2 can kick start the genre into life and bring about a next-gen of mmo's that don't conform so closely to the wow template. Either that or a more indie MMO can come along and strike the right balance between free-form and hard-core - by which I mean, doesn't have one of those entry-level barriers that say "You must spend 1000 hours cutting trees before you are allowed to have fun"