Doggy and surfboard are really great positions, but they only really work with certain girls. When she's either too tall or too short, the angle doesn't line up properly and it's hard to get ideal penetration. When in the doggy position, the booty HAS to have that 'heart' shaped look to it. Oh, the visual ALONE could create a gusher. And then to get a grip on that lil bitty waist...oh, it's ON!! Some girls are so submissive in this position. They bend over, face down and to the side...and just LET YOU DO WHAT YOU WANT WITH IT. "Oh, just take it, baby! TEAR...IT...UP!!!"
Over the last couple years, I've grown a HUGE liking to the spoon, where both of you are laying on your side. This allows for long, deep stroking. The slippery friction created in this position really makes for explosive releases. Plus, it's a nice position to go to if the lady has fatigue in her legs from them being spread too long. It's also an intimate position to work in. You can get close and snuggle and still stroke away.
For me it works best with lean to semi-thick girls. For ladies with really big booties, it's hard to get the ideal penetration...unless the guy literally has a third leg.
CG and RCG are nice, too. These work better with shorter ladies, and girls with nice, bubbly asses.
Call me boring and old fashioned, but nothing beats MISH. I love being body to body with a sexy woman, feeling her thick thighs wrapped around me, the intimate tingle of a wet mouth and tongue roaming all over as you kiss and neck each other (not enough ladies do this, btw). All that intertwined action stimulates sensory overload, and help guys who may have a hard time popping. Well, it works for me, at least.
Mish is my favorite, with the spoon a close second. I highly recommend it if you've never tried it.