In my experience with my male and female and with many shelter rabbits (and drawing from friend's experiences) males tend to be calmer and more affectionate (or at least more accepting of affection). Females tend to be bossier and more territorial (though spaying often helps this part, it can be ingrained in some).
My two generally follow the trend - my female is absolutely the dominant bun and is quite bossy. She's brave and loves to explore while my male lays around and waits to see what she does. They don't follow the trend because my male doesn't like to be petted and my female looooves pets. So every bunny is different, but I think most follow at least some aspect of the gender stereotype if not all of it.
I also think the differences are far more apparent if you have a pair than a single bun. If you have a single and are just concerned with human-rabbit interaction, you may not see much of a difference, except that females can be a bit more dive-esque (if that makes sense, though there are plenty of divos out there). With a pair, I think the difference in genders is much more apparent as you see how they really interact with members of the same species and there will usually be some gender related behavior, even in fixed buns (and usually it results in the female being dominant and bossy; haha).
I don't think either is better, but I think they're definitely different and can fit better with different people. I definitely get along better with the laid back male personalities than the feisty females, but there are plenty of people who love the girls because they're feisty.