jackson heights ....will take about 30 min to midtown, not bad.
Ridgewood...I'm moving there! will take about 25 min to 14th ST/Union Sq. The area around Myrtle Ave and Forest Ave is really nice, I love it.
Jamaica is not a nice place. Search this forum for Jamaica and see previous comments. Forest Hills is nice, and won't be too long to get to midtown.