I rarely trim, but when I do I trim it short, but only in the immediate area around the actual penis itself, balls are way to fragile and a small miss leaves I cut, and I dislike any cuts in that area more out of paranoia than anything.
But no, never clean shaven. It'd just look weird, and having some hair there is comfortable and nice. But yes, its hell when I let it get too long. For years I just didn't, 'cause I thought it'd be fine. Slightly itchy? W/E. Parts get caught in it? 5 second adjust, everyone does it. When it got to each hair being at least 5cm long, probably longer, the bases started getting unnecessarily sharp, and cutting me from time to time. I barely even know how. So I got the hell rid of that and have not let it reach that length since, though it comes close every few months.
Its kind of like my beard in many ways, though for me that's more laziness than anything. CBF touching it, but then it gets that little bit too long and it hurts to rest my chin on anything, instead of being a nice soft cushion, so away it goes.
In both cases my partner prefers me with hair. She doesn't shave there either, though she does try to trim from time to time. Porn has made her think that looks better or something, but she knows I don't really care so long as everything is accessible, so most of the time she doesn't bother.