I've got a Razer Copperhead. It's a great mouse.

I have a Logitech G5 and it's nice, but my only real gripe about it is the scroll wheel....

I hate how every middle click usually results in a roll instead of a click due to how the wheel can be tiled left and right (especially annoying with internet browsers where it's used to open links in new tabs).

Speaking of tilting the wheel, it doesn't register for Windows and I've never had it work even with the setpoint software. However, it does work on Macintosh computers which is great for design and editing software.

I also hate how it rolls, the clicks don't feel right and over scrolling happens all the time in a game like Counter-Strike.

Lastly, the rounded edge of the wheel feels too narrow and after some middle clicking, it usually starts to hurt the tip of my finger.

I have a laptop,I don´t use a mouse.

I have the Mx518 (looks exactly like the second picture you posted) it is a great mouse and I've had it for almost 4 years.

edit: after checking the image properties, that is the Mx518. Great choice

I'm just using the generic dell mouse which has been going strong for nearly 3 years.

Some random GE wireless.

The gamiing one from Microsoft. Laser Mouse 6000 I think it's called. I've been very happy with it.

The best Mouse... ever... period...

Logitech MX700