I'm 18, and I prefer the moderate resorts. The values are really fun when you're younger, but now that I'm this age, they seem kind of noisy and crowded to me (a lot of little kids running around). For the moderate resorts, I prefer Caribbean Beach... It's really a nice place. It feels very bright, tropical, and has great, great pools which most 18/19 olds would really enjoy I think. That would be my suggestion. If you can afford a deluxe, I've always wanted to stay at Animal Kingdom Lodge... that could be fun.