What Ipad do you use?

I'm planning to get the 13-inch iPad Air for schoolwork and gaming, but I’m unsure if the size might be too big. I’ve noticed that many people use the 11-inch version. For those of you who play games like Love and deepspace on iPads, what model and screen size do you use, and how has your experience been? Will the graphics and characters in the game look weird if the image screen size is too big and do you find the battles harder to do?