Michael84 said:
...Hair is not even on the second place, it's far behind...
NO! That ^ IMO is one misconception and over-generalization that I've noticed is grossly misunderstood here on this forum.
"Hair" IS important IF it is detrimental to one's appearance to the point where it DRASTICALLY reduces a guy's sex appeal to the opposite sex. What happens then, is a guy in this circumstance will be automatically rejected (at least on a subconcious level) by the VAST MAJORITY of females, whether he likes it or not.
There IS VERY LITTLE a guy can do in this situation, because it is already "game over" before he can even have a chance to say one word to her. She has already made up her mind before he has even a slight chance to prove his "charisma" or "personality" or "behavior" or any of those *other* things outside of hair you mentioned in your post.
Hair is NOT a problem like you say for MOST guys, as most guys will still have average enough appearnce outside of their hair that will keep them in the game long enough to prove their *other* qualities.
BUT - if having a major hairloss issue takes you out of the game, and you cannot come up with a solution to deal with it, you are screwed. There is no way around this.