What's the best Megaman song?

[Leadified]

Goodnightmoon said:

Maybe is not the best but I love it!
https://www.youtube.com/watch?v=6yfOwBOn9wM&index=5&list=PL4472B402F1050329

In many cases I prefer the Gameboy versions of the OST over the NES ones. Except for Mega Man II, we don't talk about Mega Man II.