I wait with FH grip (eastern with slight shift of knuckle 'tween bevels). I wait on return of serve with my 1HBH grip (eastern) 'cos I find I can spin my racquet to FH grip instantly, but always fall short a bevel or so going the other way when reacting to a serve. My other hand is always on the throat.
At the net I roll continental, and choke up the handle about an inch or so.
Racquet: Dunlop Bio Max 200G + Volkl Cyclone 17 @ 52lbs