Can someone be to muscular? Sure. Beauty is in the eyes of the beholder.
From the most basic parts of our brains, brawn effects folks in a variety of ways:
Our brains can be trained to view it in a different way, but, in the bottom of our brains, there's that initial response (the military trains recruits how to shut the base part of their brain down for just a few seconds so that they might remain calm and analytical (the top part of the brain kicks in) even in the most frightful situations, such as being underwater without air.)
In combative sports, and most team sports, strength, and speed, are, of course, crucial to the activity. In hunting food, before supermarkets, clearly, the survival of the fittest was the name of the game. However, technique, and ingenuity, also, clearly account for a lot.
We pick our preferences at both a conscious, and sub-conscious level.
Having been in the weight room for 33 years, and being a very accomplished athlete, I've met with any number of different reactions to the way I look, behave, and so on. It's interesting that the most frail often seem to have the most pronounced reactions (a perceived threat, I suppose.)
All the aforementioned chatter aside, some folks like fat folks. I don't understand why someone would let themselves go like that. Some folks are into folks that look like they are literally starving. I don't understand why one would do that to themselves, either. Some folks get wound up over tattoos, etc., while I don't understand why someone would ruin a decent body in that way.
What it gets down to is it really doesn't matter. If you don't like skinny folks, don't hang out with them. If you don't like fat folks, don't hang out with them. If you don't like tattooed folks, don't hang out with them. If you don't like idiots, don't hang out with them, and so on.
On a "real jock" site, one would have an expectation that there would be true athletes there, and on realjock.com, there are many, but, there are also what we call "wannabe's" or those just coming along for the view. There's also "haters" and some very angry, self-loathing, folks who live in a world of depression, fear, and bitterness, of their own creation.
I don't understand the fan who watches cars go in circles for 500 miles, but, NASCAR sure does and packs 275,000 folks into Texas Motor Speedway to see those cars take left turns for 4 hours.
So, whatever the question, can one be to muscular, or to skinny, or have to many tattoos, or be to fat, or to smart, or to dumb, or whatever, the answer is usually yes, of course.
It's all in the eyes of the beholder, and not a difficult question at all.
Muscles are a purely masculine thing, signaling the presence of testosterone, and what makes men men.
I personally like my guys looking like men, and not starving, and not weak, and not effeminate but, men, but, that's just MY taste. You're free to like girly men if you wish.