The different archetypes do have some effects throughout the game. For instance Nerd / Loser types aren't good at approaching girls, higher threshold needed. Jocks gain fitness XP faster. Playboys have a compulsion to have sex with girls that other archetypes don't have. Nerds have an easier time of talking "nerdy" with Hailey.
Your archetype also affects things like what movies you'll enjoy, your cock size, and stuff like that. From the top of my head, the job interview is hard on losers, and just little things like that. Nothing HUGE, but also there are lots of little unique text / description things for the different types. It's something I do want to increase how the game reacts to, if anything you will only experience these effects in very subtle ways, but they are there.