I'm pretty lazy about makeup. However, I think it's super important to regularly moisturize/use sunscreen, because UV damage can result in scary things like skin cancer. Errr seeing as I forgot to wear moisturizer today, I'm going to apply some RIGHT NOW.
Also, I'm actually really against foundation - luckily, I have great skin and don't need to worry much. But even if I didn't, heavy makeup would not be my friend. If you have acne or rashes it tends to spread infection and further increase irritation. I also don't love that it tends to be popular with people who have great skin, either to lighten or create the appearance of tanning. Girl, be comfortable with yourselves! You are gorgeous! But a lot of these problems are rooted in media representations of beauty, etc.
Although, I'm not going to criticize another woman's makeup decisions. I mean the most important thing is that you go out feeling confident and comfortable. If makeup does that for you, then go for it. Even though I don't wear foundation, I do love mascara and eyeliner and like to make them part of my daily look.