Good hygiene is important to most girls. You don't have to be high maintenance. Just make sure your hair isn't greasy, your clothes aren't stained, you brush your teeth, etc. Girls pick up on detail very quickly compared to guys and will notice even if your guy friends don't.
Yep hygiene and presentation are important, that means no greasy hair, no bad breath, and no bad smells (which includes strong deodorants and cologne erggh). TBH I would take BO over cologne any day, it makes me want to avoid the guy instantly. Also dress in a way that reflects your own style and preferences, but pants hanging low showing your undies is a big nono.
I would say you are definitely attractive in terms of genetics. You do seem a bit untidy or unkempt but that could be because you're just buming around at home or having a bad mood or something.
Different women have different tastes. Generally, most women (in terms of looks) tend to look for signs of health and fertility. That being said, other factors than looks play a vital role as well.
Leonardo DiCaprio, Cristiano Ronaldo, Crown Prince Haakon, Jay-Z and Brad Pitt are all considered attractive, but they don't physically resemble each other.
I agree that different women have different tastes, which is why the second part of your post is a contradiction. I've never in my life found any of those male celebrities attractive. I remember growing up seeing the magazine features swooning over Brad Pitt and I didn't see what the fuss was about. He is just a bit of a pretty boy and has no masculine features and no personal appeal to me. Of course that's my interpretation and others might find him attractive, but that doesn't mean he should be portrayed universally as the hottest guy on earth, as the media has done. Same goes for Ronaldo. Jay-Z? Nah.
I prefer a down to Earth kind of guy who has nice features and isn't too metrosexual. At the end of the day it's down to personal chemistry shared between any two individual. Looking at a picture in the magazine can be misleading because things like pheromones, personal hygiene, mannerism and personality play a big part in attraction when meeting in person.
Also the media keeps telling us who we should find attractive i.e. Angelina Jolie, Brad Pitt etc..only rarely do they hit the spot for me. So if I were a guy I wouldn't go look into movies and magazines for my inspiration.