Both or the more the merrier.

I have had a couple chicks that knew how to jack me good, but, to be honest, I far prefer a dude to jack me. They just know how to work a cock better, how to handle balls and, if it is with the right dude, how to work your prostate to make it one hell of an cum. I cum WAY harder from a handjob from a dude than a chick. But, beggars can't be choosers. lol

I have had quite a few handjobs from girls and women over the years but not from a guy since my teens. So I would say from a guy. It would be exciting to experience that again.

Either is great but have found in past that guys are often very good at getting other guys off. My best handjobs have been from guys. Best blowjobs too actually.

Prefer guys to do it, since I like their greater intensity on my dick. If a girl can do it as well, and I can finger her pussy at the same time, that is also good. Most of the time guys give better handjobs as well as blowjobs. It's also easier to find guys to do it, especially at the gym.

both anyone who will jack of with me is great cum one cum all

I have had not so good hand jobs by men and woman but also had some great ones by both sexes. Really depends on the amount of experience they have. My wife now gives best blow jobs I ever have had but see has learned the art of giving them.