Mostly some isometric RPGs like Divinity: Original Sin, Pillars of Eternity, Expeditions: Vikings, Starcraft II (not RPG but isometric too), etc. I would like to try Witcher 3 as well, and I think it'll play nicely.
Not that big of a gamer though (probably will become with this better hardware), I want my general windows experience to be better. Chrome suffers now for instance, as I like to open gazillion tabs in it.
Monitor is some Philips LED 243 V. 1920 x 1080 resolution. Not sure how good or bad it is.