theres Eggs, sometimes it can be crowded and sometimes cops swing through, but more often than not its fine to skate.
theres a few ledges and a ollie up 2 set thats good to manual near the aquarium right on atlantic ave i think.. theres a few ledges and shit up and down that whole little walking area they built in the middle of the street..
i still skate copley at night every so often, and around the jackson mann has a couple decent spots..
financial district is all but dead, they've removed or knobbed almost every decent ledge that was there.
roxbury and dorchester seem to be where its at for stairs/gaps/rails and shit of the larger nature, its just all hiding on the back streets and shit.
but more often than not i find myself driving to skateparks or we end up driving to east bumfuck to some random spot we've heard of through the grape vine.
i'll try to rack my brain for a few others though..