I made the switch from Notepad++ to Sublime Text recently. Sublime Text feels quite a bit more polished and was easier to get it setup to fit my needs. Definitely recommend giving it a try.
Out of curiosity: is there anything you miss from npp? Any critical feature that isn't there in Sublime Text?
Sorry for the late response. I cant recall anything that I missed from NotePad++. Once I was all set up in ST2 (which was super quick thanks to the package installer), everything felt the similar.