Not at all. I wear a buff, gloves, and a long sleeve sun shirt. I thought it would be hot as well but it actually keeps me cooler than I am in a t-shirt and shorts. Plus you can dip it in the water occasionally when it's really hot out, although I've heard that reduces the sun protection somehow.
I'm what I affectionately like to call "neon white", I get burned if the moon is too bright while I'm night fishing. I'm not confident in getting sunblock everywhere my skin is exposed, especially the bends and folds of my ears, lips, backs of my arms, ect. I also buzz my hair and anyone that's ever burnt their scalp can tell you, it sucks. It's about impossible to cover it with sunblock, and a hat can only cover so much of my oversized dome.
I know several guys, some of them not even that old, missing big chunks from their arms, face, one that's missing a good portion of his ear, it's not a good look. I bet Ol' Mark Davis wishes he'd worn one his whole career so he didn't have to wear a big bandaid on his lip. I know it's not the best look, my wife thinks I look ridiculous (which doesn't just go for when I'm going fishing honestly), but I'm going to do what I can to protect myself so this sport I love so much doesn't end up killing me.