Mosquitos are not an issue in Boquete. I won't say you won't see one or two, but there is no sitting water here which makes them a non issue.
Coffee flies can be a problem for visitors. However, once you've been here awhile and your body gets acclimated to them (for lack of a better word) then even they won't bother you.
I visited Boquete twice a year since 2007 and it became my permanent home in 2011. 70 degree days and 60 degree evenings makes Boquete ideal.
I'm pretty well traveled with 43 countries under my belt and hoping to add to that number in the future. Boquete is perfect for me.
There are plenty (I mean plenty!) of volunteer opportunities here to keep you busy. Boquete Artworks, Theatre productions, Bid 4 Boquete, etc. The list goes on.
Not every place is for everyone, but some things you need to check out for yourself.