unfortunately, I am a left handed mouser. I've yet to find a nice gaming mouse that I can use with comfort. dammit!
Funnily enough, I too am left handed but use my mouse in the right hand... dunno why but it feels more comfortable that way. In the very early days I tried using both my left and right hands to operate the mouse and found it was more natural in my right hand.... and this was back when it was just a 2 button mouse with a scroll wheel, so it wasn't about accommodating additional buttons, either.
Thing is most mice are made for right handers and additional buttons are placed one the left side, which makes it difficult for left handed users to access them. In fact, I don't believe I've ever seen a left handed mouse. Why manufacturers don't make them I don't know, given how many millions of left handed people there are in the world. I mean, once they set up the process it wouldn't cost them any more to produce, would it! And think of how many left handed users [who actually use their mice in the left hand... unlike me] it would appease.
My current mouse is a Logitech M510, which has 2 buttons located on the left to go back or forward in Explorer and on web pages using IE, FF and other browsers. I don't know if they're programmable or not... being I just took it out of the box and didn't read the instructions [like who needs instructions to use a simple mouse?, I thought]. Yeah, I bought it in a keyboard/mouse combo earlier in the year but only just took it out of the original packaging and started using it a few days ago, so I'm still getting used to it and sometimes forget about the additional back/forward buttons.
Hehe, this left handed, right handed thing reminds me of this twerp I used to work with... had little man syndrome and had to act tough to somehow feel important. Anyway, one day he tried picking a fist fight with me at lunch time [my 6' 2" to his 5' nothing] and one of the things he said to try and provoke me was that I was as 'queer' as a left handed screw driver, to which I said: "Well that's not as queer as you might think."
Next thing he was puffing up his chest, pointing his finger in my face and came up with: "You're a f**king idiot, there's no such thing."
The upshot of it was that I won a 100 bucks when I took in one with a specially moulded handle for left handers and showed him... told him that if he didn't pay up I'd wring him out like a wet towel until it popped out of his wallet. Yeah, and I took it off him, too. Somebody had to bring him down to size... reckon I did him a favour cos his manner toned down considerably after that... which probably saved him a few floggings throughout life's course.