Primarily, I'm looking for a strong, active community.
I'm a big KOF 13 player - however, in the US the community is practically non-existent, and online is just as worse.
I hear that everyone is on Supercade and GGPO for online KOF play. I'll hop onto that in due time.
Regarding the type of fighting game that I want to play, I play whatever. From Virtua Fighter to Street Fighter and everything in between, however, the focus on a strong community and great online netcode is key.
Games like Injustice and Tekken Tag 2 are going to be future top hits, but are people going to focus on those more than they do UMvC3 or SSF4AE as time goes on? Probably not, as Capcom is always solid on it's hold on the fighting game market.
In the end, I'm going to play what I love, but that doesn't necessarily mean I will go anywhere with it. I love KOF 13, but the community is practically non-existent online. Though I love KOF 13, in general, I love fighting games, hence why I am so open to any other fighting game out there that I can become a good player at.
Basically, I want to become a more competitive fighter, play online against other good, competitive people that can help me become a better player. Choose a fighter to focus on that will have a long lasting community to be able to play against.
If I was in Mexico or Korea, KOF 13 would be no problem. However, I live in the US, so maybe I have to have a more Capcom-focused look at how I approach fighting games and their communities.