I started this thread because I am of 3 minds - spend more hours trying to master flash photography or get a few fast prime lens or move on from DX to FX (already poisoned) and fast lenses (deep deep hole in pocket after this). Currently using D90 and N 18-200mm f3.5-5.6 and SB600 (and at moderate ISO) most often for indoor photos. But very unhappy with the quality of the pics. Also tried using my 35mm f1.8 w/o flash but not often I can get close enough to subject eg at events like performances in relatively low light. Really admire those who took clean sharp pics for indoor events like the recent Riverside Mid-Autumn shows and the Gundam shows.
Appreciate any advice fron my fellow CS'ers.