Perfect squeeze spot, make it 16bb and fold if shoved on. Don't like calling in any spot unless both players are fish in which case I call then donk out if hit.

Vs UTG opens I never overcall or squeeze AJo, but would with AJs. Offsuit combos are a nightmare OOP in multiway spots, and with UTG opening it's tough to have confidence in our kicker. With MP opening it's much closer but the same warnings still apply.

I'm with Turlock this one and mostly folding this combo to a utg open. Just about the only Ax combos I call here are AQs-ATs and AQo as a 'standard' and the latter only if I'm happy my opponent is a bit of a weaker player.
I think squeezing with suited connectors or something like 55-44 might be doable HU versus some players but I'm not sure I'm good enough to do it 3-handed, hitting low flops hard enough maybe doesn't happen enough times; I haven't the theory to back that last bit up yet though.

I'm pretty snug with 3betting utg without much history so I don't think AJo is too strong to fold preflop here versus both utg and utg+1 caller, just too much guessing for me.

I think this hand is too weak to over-call unless UTG is a super loose-aggro player. Given the limit, I like the squeeze play both against two TAG players and especially when the recreational player overcalls (since then we're getting the best of both worlds having great fold equity against initial raiser and value 3bet against the recreational).