Currently 33GB, but those are the ones I want to keep because I sometimes play through them again. Generally I delete a game after I finish it, but I keep those that I really enjoyed.
Really depends on the character and side-characters, but generally no. Something like Sin Heels seemed like a thing I would enjoy theme-wise, so I gave it a shot despite the female protag, but gave up cause I just couldn't get into the mindset of seducing men.