There are a ton of game controllers out and about for your smartphone nowadays. Many of them are paired with an app which gives you a less-than-desirable library of games. Now and then you’ll find one that stands out among the rest, but don’t think it doesn’t have its own flaws.
Just yesterday I came across the MOGA Game Controller at a shop, and they had one out that you could toy with. It felt a bit plastic and cheap, but after fiddling with it for a bit, it grew on me. The analog sticks are very close to the surface of the controller, but they can hold their own, and you won’t find your fingers slipping off. It’s designed as a wide version of the Xbox controller, but is still comfortable enough with its rubber grips on the bottom. It pairs up with a free app, and is only available for Android devices that are 2.3 and up. It will cost you $40, and would be nice to have around if you are constantly poking at games on your phone and wishing you had a better way to play.