For everyone that fights, whats your favorite submission?
Personally my favorite is the arm triangle from side control. Simple, easy to set up and you don't risk giving up a dominant position going for it. This is usually my go to move when I get side control. First I'll play with their arm a little bit and threaten going for an americana/straight armbar/kimura, and if I can't get anything too quickly I'll let them pull their arm back a little bit, trap it behind my head and lock up the triangle. Only part that gets kinda hairy is passing to the other side. If you wanna be flashy I mean you could jump over, but thats a little risky.
EDIT: and if you don't fight, what's your favorite submission to watch?