I'm not a huge fighting game player, but I've got some playtime clocked on the following:

• Soul Calibur 2, 3, and 4
  
• MvC 2 + 3
• Dead or Alive 2
• Guilty Gear
• Skullgirls
• Divekick
• Nidhogg

I also have King Of Fighters 13 Steam Edition, which I haven't actually played yet. There may be a couple of other fighting games I've picked up during a Humble Bundle at some point.

Fighting games for me are mostly a way to unwind after work. I like to try running through the arcade mode once before I go to bed. It takes a relatively consistent 20 minutes to do once I'm familiar with the game.

I tend to play a variety of games, rather than stick to fighters. Most of my gaming time lately has been dedicated to Warframe.