[Giganticface]

neverending, if you didn't like 2, there's still a chance you might like the first one. It's the only one that works well as a standalone film, and is actually pretty different than the rest, being primarily a psychological thriller without all the gimmicky torture traps. And Tobin Bell, basically is not in it. The acting isn't great though, but I would consider it a fairly compelling film in its own right. It's the only one directed by James Wan, who's turned out to be a worthy contributor to the genre. If for no other reason, see it as a horror aficionado completist!

But yeah, if you hated 2, you'll hate all that come after the first one. What hooked me is the interweaving, soap opera-like mystery aspect of it, but I'd be fooling myself if I considered them all great films. It's not for everyone.

(Edit)
Of course, half the fun of each film is the twist at the end, and if you've already seen 2, it may have spoiled the ending of 1. Still worth a watch though.