kupomogli on 20 February 2015
I'll go along with the rules and choose only one, but I'll also comment that you can be just as big of a fan of one series as you can another. Final Fantasy and Castlevania are those series to me.
As much as I hate to say it though, Final Fantasy. As garbage as the series has been, I still keep buying every single game with that title slapped across it. Same with Castlevania but it's actually had good titles lately. I didn't knowingly buy games I was going to hate. FF13-2 for example.
