Some general questions about Curry, know anything?

I just discovered green curry (or Panaeng curry at the Thai places I’ve been ordering from) and I am fully addicted and IN LOVE. What is the difference between yellow, green, and red curry? If you like one, do you automatically like all three (that may be a silly question)? What’s the difference between curry from a Thai place and from an Indian place (I’ve never had Indian food before)? Finally, are there other cultures that use curry in their cooking, if so, what are they and how do they differ from Indian & Thai foods?