BB check up, what am I folding

[rafiki]

Got back into the swing of things playing short handed again online.

Really had no hesitation with the exception of my play out of the big blind. So in the face of an EP or MP raise with no reads, getting 5.5 to 1 in the BB, today I was doing:

57s : easy call
34s: easy call
A5o: called and wondered if it was that obvious
J2s: called and felt it could be a fold
K8o: called and felt it could be a fold

I think I only folded T2o and 72o in these situations. Leak ? Should I be folding more ?