Experience with different or more exotic woods

I have more experience with charcoal and electric smokers but definitely new to the pellet game. I do find it actually pretty fun using the pellet grill. It's been my main cooking source for that past month and a half. I've used plenty of different woods to smoke but nothing to crazy just you basic woods like hickory, mesquite, apple, cherry, peach, and pecan. I'd like to really start getting into using more rare or exotic woods, preferably pellets. I'd like to know if anyone has any experience using different woods and if there's a link to get a hold of more rare stuff.