My online buddies come in the 'all three' category. Although they might have lots of doubts over their own work and abilities they're usually very quick to point out the merits in everyone else's stories - even the ones which need a bit of work before they'll be ready to go off.
A good review group or critique partner will be honest about the faults, but will make you think it's worth fixing them. Mine do that and I'm extremely grateful to them.
Thanks, girls! x
btw, my short story collection, Over the Garden Fence is on special offer at 99p/99c this week.