What particular moves do you enjoy pulling off when the opportunity arises? Generally these are things that don't happen too often, and they're always satisfying when you successfully perform it.
Some examples from me:
1.) Sniping Liverpool. An innocent-looking fleet in MAO moves to Irish Sea in the spring. England would have just convoyed its new armies off the island, leaving nobody to protect Liverpool in the fall. Easy grab.
2.) Using the Black Sea to convoy. Armies typically always go around it, but never across.
3.) Using Baltic Sea to convoy. Makes for fast-travel from one end of Germany to the other.