Open limping with Suited Aces and low pocket pairs?

Can i open limp these 2 hands? I prefer limp/calling over raising with these types of hands.

Also open limps tend to set off a chain reaction of limps, at 1/2, and these hands play very well multi-way.

Also the 1/2 game I play is uncapped, so the stacks are usually deep, giving me great implied odds when i hit my sets and nut flushes.

I think I should limp these hands in EP/MP. LP Just raise them.

Open limp > Open raise? (At least in early position)

Also side question, why is open limping seen as terrible, but limping behind is seen as okay? Whats the difference?