About the uncool mouse comment - I have a Logitech MX Master that I'm in love with now, which has the scroll quality of a gaming mouse without the garish looks. It's wireless (boo hiss - yes but it's rechargeable through a micro usb cable so even if you would leave it plugged in all the time it would work like a wired mouse. In practice I just leave the cable laying about and only plug it in for a few hours once every month or so) and the scroll wheel can be switched between 'discrete' and 'continuous' mode with a button just below itself. This turned out to be the greatest thing since sliced bread.
I also like the ergonomics a lot. It has a bunch of other buttons too but I never use those. If you're in the market for a new mouse, check it out.
It's also important to note that "Gamer Mouse" != "Gamer Mouse".
His picture is of a Razer mouse, which is a line of mice that are VERY light. So light in fact that for my last Razer mouse i had to rig up a system to keep the cable elevated, as the weight of the cable was bigger than the weight of the mouse, causing it to lift the mouse when the bulk of it hung off the edge of my desk. Logitech mice on the other hand tend to be really heavy and stay on the desk no matter what, but even come with extra weights if necessary. (Also to adjust balancing.)
I'd suggest to try out both types of mice if you're gonna buy one, as either will feel better to certain kind of people. (I'm fairly strong, so Logitech's heft is a must for me.)
Since my first mouse connected to a computer with a separate keyboard (an Atari Falcon) I have been using this trick:
1. Connect keyboard with cable to computer.
2. Connect mouse, make sure cable comes up close to keyboard cable.
3. Use the cable binder that came with either mouse or keyboard and twist it around both keyboard and mouse cable so the mouse has plenty of movement space but not too much so it drags the mouse down again.
This saves on wear of the cable and lowers the resistance for dragging mouse towards you and out from keyboard. Very important for your wrist and mouse arm.
I have used a gaming mouse in every computer I have worked on, company provided or not. I don't know if it looks professional or not, but after using gaming mice, going back to one of the cheap mice just feels wrong.
I ended up bringing the mouse to the office myself, and I had the same situation happen with chairs sometimes. My rationale is that I spend a lot of time sitting around so why not just get the very best I can afford?
The mouse thing has always been my biggest gripe with Blender. As someone on a laptop, I can navigate the 3D space of other modelling programs fine (most use right click or left click and drag), but Blender requires that darn middle mouse button...
Love Logitech mice for all those reasons too. I'd recommend using the feature where you can assign a button that when clicked, googles selected text, I couldn't live without that now.
I have large hands -- not exceedingly large, but I wear XL gloves. The MX Master is a bit too narrow for me. It's designed to be held between your thumb and ring/pinky fingers, with your pointer and middle fingers on the left and right buttons, and I feel cramped after using it for awhile.
I wish they made a larger size, because I really like it otherwise.
I also like the ergonomics a lot. It has a bunch of other buttons too but I never use those. If you're in the market for a new mouse, check it out.