Depends on size of equipment and size of the individual. Doing a squat position on top can be good, but can be very tiring for the lady, so make sure to help out by putting your hands under her bum and help with lifting a bit
Reverse cowgirl is good, too, especially if you like that view! Doggy style is good if the guy is familiar with the use of rhythm. If you're smaller, there is NOTHING wrong with that. I sometimes prefer smaller guys because they try harder to master positions that work well for them. And they are usually the best at eating a lady out