I severely doubt GOG staff will punish us for talking about hentai VNs openly if you tag it properly since most of the comments here have no idea what you're talking about.

?????/dotted outline: characters who don't talk are easy for players to self-insert into. This is everywhere from Gordon Freeman from HL, Master Chief from Halo, Link from Zelda, Doom Slayer, Pokemon trainers, etc.

Fat ugly bloke: there are interesting debates on realism in video games. In hentai games where there is some fat ugly bloke, the dynamic matters. If you're the fat ugly bloke, then that's for those middle-aged blokes who want to self-insert themselves in a fantasy world where they have a chance with young adult women. So depicting yourself realistically here helps make that fantasy more immersive.

If you're not the fat ugly bloke, then this is a cuckold / NTR game in which case you want some fat ugly man to defile the woman of your dreams because you get off from your partner getting sexual satisfaction you can't provide (in a positive manner) or you enjoy the feeling of sexual humiliation (in a negative manner). I don't get the ideology behind this, but that's what it is.

Hair over eyes: have you been to Japan before? Most of the kids following trends have really long hair because they copy all the young celebrities have that long hair. Long hair is cool when it blows in the wind and is another way of differentiating yourself look different in a vast sea of ethnically homogeneous societies.