1. What's your grip style?
I'm not entirely sure.. I have always been using palm grip, but it has more to do with not having owned any other form of mice and not that I actually prefer palm over anything else. I've got some rather small hands, so my personal experience often points towards palm mice's having the habit of simply being slightly too big never really becoming that comfortable in the long run.
2. What's your sensitivity?
About everything I've owned thus far has been low to mid-sensitivity. I've yet to go over 2100 DPI (none of my mice's have supported anything higher, and to this date I have never really seen any reason for it either.
3. What's your maximum budget?
There is no such thing. If money pays for quality, and quality comes at the price of money so be it.
4. Do you want additional buttons?
I don't fancy extra buttons, I'm not saying I will refuse to take any mice that features additional buttons or anything but I'm certainly not requiring any more than my regular backward / forward buttons for my efficient web-browsing experience. I will most likely never bother with macroing or setting up various additional buttons as long as it depends on some sort of software to make things work, as my past experience with such things are rather dull. In most cases I will spend lots of time into making it all perfect, then I suddenly have to make a complete re-install of my computer and all my work went down the drain anyway..
5. What games do you play?
I'm playing various titles and genres. Mostly I play World of Warcraft, I also play 2D "open world", sandboxy games like Terraria and Starboud BETA. But I do also play Battlefield 4, PayDay 2, some Hearthstone BETA and Heroes of the Storm BETA. One of my more demanding games in terms of mice performance would be a "ski jumping simulation game" called Deluxe Ski Jumping 4 where fishy mice performance often proves to be a real hassle and deal-breaker.
6. Do you mind about prediction?
Not entirely sure, but I always like the idea of 1:1 relationship between how I move and interact with the mouse and how it behaves on the screen.
7. Other relevant information:
I do fancy quality, I hate equipment that feels fuzzy and cheaply built. You might give me the best preforming thing on earth, but if it feels like crap I won't enjoy using it.
I also prefer solutions with on-board memory or some way for it to remember my settings so I wont have to configure everything each and every time I re-install my computer, accidentally remove the software and whatnot. I also prefer "control" by which I mean I take controlled movement over blazing speeds any day of the week which is the main reason why I tend to prefer more rough texture on my mouse pad's instead of slippery smooth ones as I hate when my mice glides to easily as I feel I lose control of the motion. For me the most important thing is the overall quality, in needs to feel good in terms of the built quality and everything, it needs to fit my rather small hands in a good way so I don't feel like it's made for something quite a bit larger than what I'm born with and the performance needs to be stellar and stable.