Hand 1: is it too weak to just call the river bet? If he doesn't have the flush he's probably not calling anyway. As played... well, he probably assumes you don't have a flush so that widens his range a bit. You may have to call.

Hand 2: interesting hand. the whole hand is strange... which usually means i'm calling.

Hand 3: Another tough one. A lot of people say don't try and make big folds, i'm not folding here. T8 and 85 are possible, as well as maybe a T7 and there's a small small chance this is a bluff (i've seen it before...) or AA/KK

Hand 4: Have you been three-betting a lot? This was kind of the flop you were looking for, isn't it?