Hi man, welcome back!

If we're talking PPVs or matches from the last two years, the first that springs to mind is Money In The Bank 2011. Basically, the whole show was great.

CM Punk in his hometown against John Cena, Daniel Bryan and Alberto Del Rio winning two very good MITB Matches, Christian winning the World Title after being kicked in the nuts.... great show!
I know you said shows besides WM and Rumbles, but definitely watch HHH/Undertaker from WM27. The show as a whole wasn't one of the classic Wrestlemanias, but definitely watch that one!
My memory is pretty crap, but Extreme Rules 2011 apparently got pretty good reviews too. Christian won the World Title for the first time at that show, in a Ladder Match against Del Rio (though he did lose it on the following Smackdown

).
Last year's Summerslam was pretty good too, with a great No Holds Barred Match between Christian and Randy Orton as well as a rematch between CM Punk and John Cena to determine the Undisputed WWE Champion.
I'd also recommend Vengeance from last year too, if only for the spectacle of seeing Big Show and Mark Henry destroy the ring and Alberto Del Rio and John Cena follow it up with a great Last Man Standing Match, starting in the destroyed ring.
These are the ones that I'd go for, others opinions may vary. As for 'avoid', well, I remember the crowd at the Capitol Punishment PPV last year being pretty dead for most of it and it hurt the event. Hell, even Alex Riley who's from Washington DC (where it was held) and was involved in a fairly major feud with The Miz at the time was struggling to get them to make any noise...
