Well, I'm bi, but I'm guessing you're wanting opinions from guys who are attracted to chicks, so I'll give my two cents'. My girlfriend wears makeup, but not a lot. Typically she goes with eyeshadow and mascara, and it really makes all the difference. She's pretty without, but the way she does her makeup, it accentuates her features perfectly. Some chicks, however, don't know s*** about makeup. I could definitely do without all the caked-on crap and whatnot... imo, unless you're on stage, you don't need layers and layers to do the job.
As for heels, I think they're hot on some chicks, not on others. For a girl who's short but has long legs, heels can emphasize the length of her legs, and also put the calves in a very aesthetically-pleasing position. However, they're unbearable (yes, I know from personal experience, way back), so I don't really recommend them to anyone. My gf is 5'9" (bio chick, just quite tall), so I've asked her kindly never to wear heels or platforms, since I'm a shorty myself.
SD