My personal favorite fighting game this generation was SoulCalibur 5.
Best gameplay in the series. Addition of meter changed the way matches ebbed and glowed, added another layer of strategy. The changes to GIs were great and one of only two times in the series they worked as intended. There were some balance issues, and the only patch the game got changed it for the worse (imo). The game is a super version away from being my favorite fighting game ever.
Dead or Alive 5 has been AMAZING this generation. The support and level of devotion Tecmo has shown to the game and to the competitive scene is better than any other game save SF4 (which says a lot, since it's small fries in comparison). The gameplay is almost the best it's ever been (still prefer a lot of stuff in doa3.1), but overall, I think it's the best entry in the series.
Tekken Tag Tournament 2 was pretty much a love letter to long time fans of the series. I think it literally has anything a Tekken fan could ever want. It's why I'm sad they didn't try anything particularly new (so far) with T7. I'm sure it'll be great, but feels really close to other Tekkens right now.
Street Fighter 4...I had a long, hard relationship with it. There are tons of things I hate about it. OS, vortex, easy inputs, shortcuts. Took me a long time to adjust to the floaty jumps and knockdowns. Game just feels a bit off to me from other SF games. I hate how easy it is to reversal.
But, these past two years, I've tried to approach it as another game and not another SF game and it has grown on me. As a competitive player, I can't help but appreciate the diversity this game shows at upper levels. It is by far the most balanced SF game ever and that is amazing given the cast. Still playing it, and can't wait for it to come out on PS4. Don't see myself not playing this for a long time.
KoF13 love the game, think it's a great entry, but didn't bother playing it much. Broken online made it hard, especially with how execution intensive it is.
Then there were tons of re-releases that will always get play from me: Marvel Origins, Vampire Savior, STHD.
Such a good generation for fighting game players.
Also: Shoutouts to Markman and Madcatz for ushering in fightsticks with premium parts and builds.