My "go to" eyepiece is usually the trusty 20mm Nagler Type II. In my Celestron 11-inch SCT, it gives me a wide field,140X magnification, good contrast, and is sort of my favorite eyepiece for a "first look". When cruising the sky casually, I usually use either this one of the 41mm Panoptic, if I know I am going to be looking at large nebula, like the Lagoon or the Veil.

Stargazr
Land of Oz Observatory
http://www.astrolandofoz.com