The Calibre Of Ace-King...? (Suited or Unsuited)

I have let AK go a few times, rarely preflop, but last night I ran into players who absolutely refused to let big slick die. Each time, they decided to slow play, I would flop TP, they C-bet and I push, only once did I lose because eash time I pushed, they called with no thought what so ever. Each time I pushed it was an overbet to the pot.