I don't have a Favourite Card or Hand, Having Favourites leads you into playing those Cards/Hands more often and when they win you convince yourself they are your Lucky Cards! That always Win for you, They Don't!
Playing in a Live Tournament I was on the BB and the person next to me announced he had his Favourite hand and pushed all-in, Slowly around the Table everyone was folding back to me, and having been dealt K/10 off I was considering folding myself, Then he made a crucial mistake he said J/10 of Hearts always wins for me, and I immediately snap called, My reasoning was I was already in the lead and if he managed to hit a ten, my King was the better kicker.
The cards were laid down face up and sure enough he had Jack/10 of Hearts, neither of us hit the flop, turn and river So it was goodnight from him. I won the hand with a lowly King High.
That's why I don't have any Favourites!