LP: Call down. You're ahead/have hidden outs often enough and it's HU. But I seriously doubt you're ahead often enough to want more money to go in.

LAG/TAG: Call then donk/call vs most. 3-bet vs donkish LAGs and call down vs TAGs on the solid side of things. I know I often raise marginal hands w/showdown value from MP2s spot (intending to fold to a 3-bet). It costs the same as two calls and will give villian a chance to fold a hand that can outdraw me.