One of the most fascinating things in chess, to me, is to play with unbalanced material on the chess board.
For example 3 pawns versus a knight or bishop.
Or a queen versus a rook, knight and pawn.
Or a rook + pawn versus 2 knights.
In the following game I had build up a nice looking position, but my opponent found a good move, and I thought that all the advantage had vanished.
But suddenly I noticed a chance to go "unequal"