I own 2 copies of Megaman 1, 3 copies of Megaman 2, 1 copy of 4-10, and both arcade machines (Anniversary collection for the win).
I also hacked my IPod touch to make the select a robot master noise (when you switch between robot masters and it makes that beep noise) to make the keypad sounds, and the energy refilling noise for when you plug in the charger.
I have an extensive knowledge of all Megaman games from 1-10.
I can play 23 arrangements of Megaman music on piano which are:
1) Galaxy Man
2) Dr. Wily Stage 1+2 (MM2)
3) Metal Man
4) Splash Woman
5) Jewel Man
6) Tornado Man
7) Strike Man
8) Blade Man
9) Magma Man
10) Flash in the Dark
11) We're the Robots
12) MM10 final boss theme
13) Bubble Man
14) Protoman's theme
15) Bass's theme
16) Megaman 2 Title
17) Megaman 3 Title
18) Boss Select Music (MM2)
19) Elec Man
20) Cut Man
21) Megaman 1 Dr. Wily Stage 1
22) Flash Man
23) Password Screen (MM2)
I printed out an E-Tank logo to make my own E-Tank drinks (Diet Mountain Dew)
That's pretty much all I can think of right now.