Do what you want. As long as you don't spackle it on and look like a hot ass mess you should be fine. If you look good with full on makeup then a guy will think you look good. If you look good with natural makeup then a guy will think you look good also. I know a lot of people on here say they prefer natural looks but that doesn't mean a girl won't get attention if she has full on makeup. I know girls that wear full on makeup and guys like them alot. As long as the application isn't bad it doesn't matter.
Makeup can make girls more attractive. Here are some general examples:
(1) Functional attraction. You can tell a forced smile from a genuine one by whether or not the eyes crinkle (moving lips is voluntarily easy). Eye crinkling can also have the effect of shifting eyebrow position. Makeup can make girls more attractive by making forced smiles more difficult to spot, the result being that they seem more genuine. Eyeliner makes eye crinkling (or lack of) tougher to detect and eyebrow plucking/penciling can pre-set eyebrows into smile position. Notice that when women use too much eyeliner, they give off the impression that they're hiding something. Concealer can cover blemishes and blush can make you appear to have the natural blood flush (rosy cheeks) that occurs when you're excited/stimulated. From a functional standpoint, makeup can make girls more attractive because it makes them seem more excited and happy than they really are. Guys that find girls without makeup attractive are usually referring to girls they see that are genuinely excited and happy (with consistent facial expressions).
(2) Style. Makeup can also be a projection of your individual expression. It's just like the tone of your voice, your body language, and your fashion choice--makeup is another way to express your personality. If all of those various physical and material accessories jive into and are consistent of a common expression, you will probably be thought of as beautiful.
As little make up as possible. Don't put on mascara that clumps up, don't wear too much eye liner, don't over pluck your eyebrows. Try to keep it as natural as possible and ANY woman would look best that way. I'm not too fond of clowns.
I never wear makeup. I'm sure it wouldn't hurt, but I have been told a lot that I am pretty, so I guess I'm not hideous without it. But I do wear that covergirl eyelights mascara to bring out my eye color. And that's about it. Well I always have chapstick haha
I like wearing my makeup both ways. Most days, I go for the more natural look with my make up, but on special occasions I will put on a little more make up, or if it's a night time event, I will go for darker colors.