ale pajamas!!? sounds brilliant.
anyways, i've always slept topless but i've got like pajama bottoms that i wear. they're actually really cool chequered ones. i'd never wear whole suit "proper" pajama type things, but who cares what you wear when you're sleeping as long as you're comfortable in them. I wouldn't worry if i was you, unless you're sleeping with someone... then i'd definitely ditch the PJ's lol
though if its really hot, i dunno how you can wear them... for me its either boxers or nothing if its really hot else i can't sleep very well.