[JDMcNugent7]

Limping in the Cutoff with KQ when everyone folded to u is definitely a mistake. It is much too likely you have the best hand here, and by not raising you aren't gaining anything from your superior hand.

It's true hands like AJ, KQ and KJ can be trouble hands for many players - but they can and should be able to be profitable hands as well. Just don't fall in love with ur AJ when ur ace flops, and be able to fold ur KJ on a king high board when ur facing alot of aggression.
While limping might seem like the safer approach, in many ways it can be alot more dangerous, as you just let everyone limp in, and havent pushed out or defined any hands- it will be very hard to know what ur up against once the flop comes.

Also, by not raising and isolating, getting the pot to be just between 2 or 3 players, you lose the option of winning a decent pot just by making a CB - and those smallish pots certainly add up over time.