I'm no vet or anything but here are my thoughts on the DR:
1. I don't know if there is a comparable experience for a newbie than to walk into DR/BM for the first time.
2. Too may chicas are "good from far, but far from good". They look really good from a distance but once you see them up close, you may be changing your mind. It happened to me a bunch of times.
3. The mistake too many guys make is picking the chicas solely based on looks alone. While I realize it's more difficult for those of us who don't speak Spanish well to "interview" them, but there are ways around that. Ask them to get a drink and sit with you. If they are overly eager to go to your room (FYI-it's not because you're so handsome, that they must have you right there and then

), drop them and say next because this is how they will be up in your room.
4. Don't generalize about Colombianas, Venezuelnians, Ticas, Nicas, etc. It may save you from a few bad ones but it will undoubtedly prevent you from experiencing a few good ones too.
I am arriving in 45 days and I plan on being at the DR every night, and not paying cien unless it's for 2+ hours. I will also hit the MP's and a few strip clubs, but DR is great if you play it right.
-Orange