Decent year.
PC : Year of mainstream eroges.
PS4 : I didn't buy a single game in 2015. I did get Disgaea 5 for free tho. It was fun.
PS3 : Nice sales. Didn't buy a single game full price but still had a constant stream of nice, recent games.
3DS : Not it's best year, especially in terms of RPGs.
Vita : Finally played some of my 2014 games, lol.