A little info would help a lot
What do you like to do and see .....
Currently working in Texas I love to fly somewhere cooler during the hot summer, so would choose Costa Rica or Colombia (not Columbia).
Also, Costa Rica has a lot of tourists, so if you don't speak Spanish would be easier. May also be good if you haven't visited Latin America before.
Another thing I like is that it's a compact country that has both mountains and beaches. I am a big fan of Manuel Antonio.