I have used laser mice ever since ball mice were "obsolete". And I have purchased a LOT of mice. Shameful amount...
I recently purchased a Steelseries Rival. Jebus Rice on a bicycle, I had no idea what I was missing. In every way, it tracks more smoothly and more accurate.
In FPS games I have always wondered why some people's mouse movements seemed more fluid than others while spectating, and I believe it's because they were using optical sensors now. I get much better accuracy and am now playing CS:GO and other shooters with a new lease on PC gaming. If you don't own an optical mouse, I highly recommend the SS Rival...
I have mine set to 1:1 acceleration (none, basically.) And I like the purple hue mine is currently set at, it's like an "arcane" purple if I had to name it. I also changed the "CPI toggle" button to just be button 6. This thing is just butter...
I'm probably gonna sell my MMO mice because I've quit MMO's entirely, and now that I think of it, my Steelseries Sensei (there's no comparison. The Rival is a better mouse entirely, especially because I'm right-handed.)
Edit;
The scroll wheel. Let's not forget about the scroll wheel - at first it had some squeak to it but now that's dissipated after some use. It is very accurate, just like all Steelseries scroll wheels. (accurate meaning in counter strike it will switch one weapon, every time, reliably when you go up or down one notch. Haven't had this success with the Razer mice I've tried...)
Found this pic on Google Images but it's very close to the purple I've got mine at currently. And the Rival is just too secksi...