im getting a mouse as a gift.. since this is my first gaming mouse I need some help.

I'll be happy to help, but what are you looking for? For instance, are you looking into a mouse with many buttons, a claw-type mouse in which you bend your fingers to grasp the mouse, a palm-type mouse in which you relax your palm on top of the mouse, a wireless or wired mouse, an ambidextrous mouse, right-handed mouse, etc? There are many types of mice and "gaming" doesn't matter as much because if the mouse suits you, you play better and thus your gaming experience is better.

However, if you want high DPI, fast response rate, you may want to get a wired mouse rather than a wireless mouse. The good thing about "gaming" mice is that their wired mice can come with weights. Why weights? Because it goes back to the feel of the mouse again, if it feels better, it works better for you. That and if you're used to wireless mice--which has weights because of batteries--you may prefer a heavier mouse.

There is one mouse that has caught my eye because it's very... customizable taking into account everything I've mentioned to you. The Cyborg RAT can change to fit your needs--with limitations, it isn't a real Transformer: http://cyborggaming.com/prod/rat9.htm I've never used it myself, but I've never been able to get myself to spend that much for a mouse.

In my personal use, I've used many Logitech mice from the cheaper M305s, to the tried and true bang for your bucks M510s (a lot of people like the M518s), to their more expensive MX Revolution, VX Revolution (and Nano), and finally their gaming series G9s. As much as I love the G9, i feel that the M518 fits me better.

i like my razer orochi. small and comfortable and a great price for a razer product

Would someone's LoL play really improve with a gaming mouse, though? I mean, it's not like LoL is mechanically taxing like StarCraft or something.

i have a rat 7, i like it, but i'm also that guy who liked the size of the original xbox controllers.

Razer Deathadder

I have a naga, very good for any game and on league you can bind your items on the numpad for a much easier item using

I can't really offer support on a gaming mouse, as I use a cheap wireless logitech laser mouse. I'm not even sure of the model. I would go with something that you like the feel of and fits your hand well. I know the G9s have adjustable weighting, so maybe that might be something you like. Basically I would go for personal feel, as in fit to the hand and weighting.

Im running a deathadder myself but I have a Logitech performance mx mouse as well (now used for work, one of the best mice I've used). Both are good mice.

What are you looking for? Comfort wise... the Performance MX is awesome.

i use a logitech 310. works great, fantastic sensitivity settings and long lasting for the price.