I have all of the small rabbits minus the Vr4, all the dual ended ones, and the Intensity. Sadly, I'm still gonna suck at answering this because I'm bad at making decisions, especially ones that involve picking a favorite something. lol
Of the rabbits I'd say the Vr3, Vr6, and Vr6.5 are my favorites. The 6 and 6.5 because of the amount of pressure they apply and the 3 because it fits me nicely without me having to do any special tricks. I'm spaced closely together and rabbits don't usually fit me well.
The dual ended ones have always been a hard pick for me between the Vr8 and Vr9. If I had to go with one, I'd probably go with the 9. I like the curve on the small end a little better and the additional length. That said, if someone tried to make me give up my 8 they'd have to go through a lot of fighting to get it.