For fucking and jerking, I like the Trojan Enz, unlubricated. I use these because I make my own lube naturally, so I don't need any extra making it more slippery. They are strong, thin and fit me snug, so even when I get it really wet inside, it stays on as long as I'm hard. It does slip around a little bit, kind of like the skin on my cock when I jerk it without lube, especially if I have precum spurt in it a few times, but as long as I don't pull it off, the ring on the bottom stays in place and keeps all the fluids inside.
If I'm fucking a girl who isn't taking birth control, I will take it off and put a new one on if I'm fucking her hard and we have been going at it for a while. I've had a few scares where I've busted the condom and it was full of my precum- that kills the mood real fast!