Tough as hell choosing just five games but I'll try
1) Sunset Overdrive- I may be calling it a bit early as I've only played like 6-7 hours of it but it's just so much fun, Grinding, wall running, bouncing, the insane weapons, the graphics, it's a total blast most fun I've had.
2) Bayonetta 2: As far as action games go you really can't do better than this, again I haven't beat it yet but from what I've played it is a beast. I just wish new weapons weren't so expensive though.
3) Mario Kart 8: It's mario Kart, really all that needs to be said, the only sucky thing about it is the battle mode is terrible but as far as racing fun it's hard to beat.
4) Transistor- This was my GOTY for awhile, between the fun/tactical gameplay, the music and the mood it all combined to be a top notch experience.
5) Far Cry 4: It's more of Far Cry 3.... which I loved, but with more varied things to do, a bigger world, and tons of insanity. The way the stealth and shooter mechanics work together is top notch
Honorable mentions:
DA:I really good game but the combat is too boring still put in 60 hours and haven't beat it yet
Binding of Isaac: Great "rogue like" tons of replayability
Velocity 2X- dang now that I remember it was also going to go in my GOTY till those other games came through and smashed the buildings.