Clipless for me.
The only time I fell off still clipped in was when I first started using them. Twice on my maiden ride! The first fall on a steep rocky hill, front wheel hit a rock and because I was travelling at a snails pace I fell to the left.. right into a Holly bush! Ouch. Several miles later we rounded a bend in the trail to be confronted by walkers, I guess we were doing 20 odd mph and so we screeched to what I thought would be a slow pace but oh no my mate who was leading, for some inexplicable reason decided to stop. As I was riding right up his chuff it was with frantic braking that I managed to stop but did I remember to unclip? Nah, fell over still attached to the bike into some cold muddy water... oh the faces of the walkers were pictures of mirth as I lay there struggling to get out!
Unclipping is second nature these days, I don't even think about it, even in crashes I never stay attached to the bike.