Does everyone play with 1x sensitivity???
1 - Mouse pointer speed - I never messed with it so I'm guessing it's default
2 - Mouse sensitivity - 6x
3 - Precision mode - I assume you mean raw input, in which case, yes
4 - DPI - 1600 (although I adjust that frequently)
5 - Mouse Brand & Model - Logitech G700s
6 - Mousepad - It's a Fellowes brand that I bought at Office Depot, I forget it's official title, but it works very well
7 - Grip method - I'm afraid I'm not familiar with this terminology =\ (the link you posted doesn't point to a taxonomy of mouse grip styles)
8 - Resolution - 1920 x 1080
9 - Window mode - borderless
10 - Problems/Difficulties - Firstly, it's really all about practice as far as I see it. That being said though, spinning is very difficult, and still is after almost a year of playing exclusively with the mouse. Streams though, I use both left and right click, and that's really helped a lot. I'm still perfecting this technique, but it is very doable.
I came here searching the internet and the osu! forums looking for what kind of mouse people recommend for this game. In the past, I was using the Logitech M510, but one of the little stickers has come off the bottom and there's some sort of adhesive residue all over it, so the drag is awful. I replaced it with a Logitech G700s, but... it's really weird... and I can't exactly explain it. It's just like, the cursor doesn't move where I expect it to based on how I move the mouse. I think it has something to do with the fact that on my previous mouse, the laser sensor was around the middle, but on this new one it's fixated towards the front of the mouse.