FI and I talked a lot this weekend about what we want to do on our HM. After hearing advice about CR, we've come to the realization that we do want to go to Costa Rica one day, but we don't think we can feasbily get the trip we want (ie, relaxation, veg out on a beach with maybe an activity here or there) in a 7-10 day trip. I feel like going to CR for just a week (or even 10 days) doesn't give much time to hit the major hot spots (Arenal, Monteverde, Maunel Antonio, etc) and neither one of us wants the hassle of moving around several times after the wedding. We are heeding others' advice that we will be too exhausted after the big day.
So that being said, we're considering Mexico, Puerto Rico, pretty much anywhere in the Caribbean with a beautiful beach, some good diving nearby, and maybe other activities that we could do if we wanted to. I know a lot of people have done St. Lucia on this board and others have done Caribbean islands as well. Could you recommend your AI (if you did one) and let me know what acitivites you did while you were there? TIA!