mine is Bg6

What a question.....

I'm very fond of f5

When my opponent tips over his K!

F4!

It's difficult to pick a favorite: c4, ...Nf6, O-O-O+, or any move that delivers mate!

c4 maybe

0-0 maybe

A subtle Ka1!!, leaving Black with 42 moves, each of which loses.

Nf7#

gxh1=N#

i like f4 too

2. Kf2 (or 2... Kf7 as black).  Normal chess punctuation doesn't have enough exclamation points for this brilliant maneuver.

Trompowsky.

1.Nc6 works for me.

I really liked Die Hard III.

The Matrix reloaded is a close second.

I haven't been able to figure out how to train my horse to jump that far in one move.  If you keep working at it, you'll eventually be able to play 1. Nxe8!

Nf8

Bc4