AK, suited or not is a premium hand, along with AQ, AA, KK, QQ, JJ and arguably 10-10, and if u have to put in all ur chips preflop, do it with these hands, all other pairs, Ax, Kx depend on position and type of opponents, I think that u definatly made the right move, folding would have been very hard, however, I once played AA so obviously that an AK suited folded preflop face up and i was embarresed showing my obvious AA, since then, i have learned that u should never play aces the same way, mix it up depending on position and type of opponents, also freerolls are definatly a waste of time