high jab- to keep my opponent's hands up

reverse punch- come on now it's easy to pull off and not to fancy!

front foot kick- almost nobody expects it from a guy my size plus i try to connect my front side elbow with my knee when blocking anything.

backfist- just my favorite move over anything else

big smile on my face - just to frustrate my sparring partner into mistakes

kumite -
jab, jab, cross to the face + back leg straight thrust kick, or backleg roundhouse to the head.
i dont get too fancy with with punches, the 'one,two' always worked for me. if u can execute a 1,2 fast and consistently, from my experience, its alot more effective than a whole lot of other stuff. but thats just me though.

street situations-
fake a jab, go to double leg take down, side control, mount, and drop bombs. usually they try to turn over which gives me their back, then do the classic rear naked choke.