My favorite is missionary so we can look into each other's eyes, kiss, rub our hands over each other's body, and hold each other tight when the top is shooting deep inside me (or me shooting deep into a bottom). Doggie would be a close second choice. Have done multiple positions in the same fuck session and that's hot too. Actually, as long as I'm getting fucked (or fucking) it's all good. Two naked men fucking each other bareback is the hottest activity there is!