In my experience, guys are pretty basic when it comes to knitted hats.
Like, with my own husband, for example. I could knit him something fancy with cables and pom poms--and he would appropriately "ohh" and "ahh" when I presented it to him--but within a few weeks he'd be right back to his boring ribbed watch cap.
It's fine. The heart wants what the heart wants and all of that. But, lord, is it boring to knit.
Which is why I was pleased to stumble upon this "All Ribbed Up" pattern, as I was searching for a hat to make for a male friend.
As you can see, it's pretty basic, but it still has just enough variation to be more interesting. Not only that, it's reversible--which I think is the super funnest thing in the whole wide world--and it very conveniently uses just about a skein of worsted weight yarn. (Which is nice for tidiness-of-the-stash, but also because if it's only a skein you can splurge more on the quality.)
I know the need for winter hats is quickly waning, but tuck this one into your favorite pattern file for the fall. You'll be glad you did!