Your body, your choice!
My choice is to trim with a #3 blade all over, except for the bush which I pluck by hand wearing a rubber glove to only leave the shorter hairs. I trim the scrotum closer, but don't shave to avoid nicks, and don't pluck as that creates spots. When I tried a #2 blade for the trimming, the hairs overlapped less and it was noticeable, to me at least.
My goal is to have a look that's even but not thick, so I can feel the sun, use less sunscreen (amazing how much difference the extra hair makes!) and when I have to wear a swimsuit, which may be quite skimpy, there's no visible transition in hair density.
I think it works out well. The shaved look is not for me since it's too out of the ordinary. I tend not to keep it up during winter unless planning an escape to warmer climes. Even the difference in the shower is noticeable once I have caught up!
I agree on Your Body, your choice... Its also about what you are comfortable with. My I trim for the most part. I leave the pits and pubes alone or I scissor trim over mowing with the clippers. I shave the boys, I found Mach 3 blades to work the best and nick free... Lastly, shaving before the beach can work against you... Keep in mind that hair does act a bit like a screen. removing it gives you more exposure to sunburn. Also if the skin is freshly shaved, it may be tender or sensitive, toss sunburn on that and its not fun.