I'm currently using a Logitech m510.

It's pretty nice, for the most part. It's got good enough accuracy, which is important to my KDR in FPSs. I like how I have the two extra buttons on the side, because they make web browsing a lot easier, because I can go backward and forward without having to press anything on the keyboard. I's so used to it, that when I have to use the mice at school without them, I still catch myself pressing the side to go back pages. I like the form of the mouse, because it feels really natural, which makes it comfortable to use and easier to make an extension of my body, because it feels like it's not really there in my mind. It has a dual axis mouse wheel, which means I can scroll and hit the wheel left and right, but I have never used it for anything.

The only thing I don't like about it is the hiccups. Every now and then, it seems to get a bad connection or something, because it starts "hanging" in some games. It was really bad in BF4, but that was due to the Origin overlay (something that I still don't understand). There's a couple other games that it starts acting up in, and its infrequent enough for me to think it's something to do with the mouse. It also used to do it really bad when I had my computer set up a certain way, which forced me to constantly change ports to find which one worked best.

I think I'll keep it until it completely ceases to function, or part of it breaks. I had a mouse that had a scroll wheel break, and this was the replacement. If I do get something else, it will probably be wired and have a good DPI.

I also have a Bamboo tablet that I got for drawing, but it seemed like I was worse on it than a mouse, so it's sitting in a box somewhere.