Butterfly. It's the most fun! Best for sweeping: X guard. Best for overall kick-assness: Cross guard. Honestly though they are all awesome, and I've never found a guard I didn't like. Every single one works. I guess I am not super high on closed guard as I find it tends to be a bit slow 'n dull, plus I hate being stacked.
I usually play sitting guard, but I want to get good at De la Riva and X guard. My eyes were opened today after a really good white belt swept me via de la riva. I tried to base and work a pass, but I couldn't do anything to remove the hook and he ended up sweeping me. Man I need to learn de la riva.
If I'm stranded in a boat, the coast guard. Seriously the rubber guard is fun to watch, lots of options.
i need one for the very very short legged. I mostly do half and closed, with de le riv (but I mostly just come up for the single)
Deep halfguard, hook guard and generic open and closed guard . I want to get a good butterfly, X, De la Riva and maybe even rubber if I can get flexible enough.
by far my best gaurd is 1/2 gaurd iam working on my butterfly and x-gaurd now mostly i think refining those gaurds would change my game completly