At small gigs I really like an open back 1x12 combo like a Fender Deluxe Reverb. Sounds bigger and more musical on low volume, more surround, but less focused than a comparable closed back. But once you get on a bigger stage a closed back helps to keep your sound directional, tight and focussed. And with single coils you need those lows, which tend to fade away a little more with open back cabs. So I prefer closed cabs for middlelarge and large venues.