If you do not like bugs, then costa rica is probably not such a great place to visit. There are tones of them, and we actually think that is pretty cool. Especially, during the green season (April - August) and rainy season (September to early December), you will see the most interesting creatures outside but sometimes also inside the house. So, make sure you know this before booking your flight :-)
I first came to Costa Rica in 1998. I fell in love with the country right away for so many reasons. I have been coming, living and unfortunately never staying off and on since.