I'll play the "edit later" card too, but locking absolute #1:
Knights of Round - 幽霊楽団 (Phantom Ensemble / Ghostly Band)https://www.youtube.com/watch?v=8EAsuxahjjAThis one I actually consider to be one of the best songs ever made, from a general standpoint. The other 9 do have my bit of personal bias, but not THAT much, otherwise it would contain all the Pump It Up / digital hardcore trash I listen to

The other 9 are in no particular order, just the last one that is more of a 'random pick' than others.
- BanYa - Love is a Danger Zone (Unofficial 'Full Song')https://www.youtube.com/watch?v=pOQmGhW7ikkWhoever mixed this deserves a fucking nobel prize. It's the original "love is a danger zone" pump it up song mixed with some sample vocals from a random audio mixing software, which makes you think "WHY are they playing bullshit like taylor swift and nicki minaj in clubs and not THIS?"
- Beethoven Virushttps://www.youtube.com/watch?v=DtKCNJmARF0 (original by Diana Boncheva)
https://www.youtube.com/watch?v=QfV6lsh6ub0 (PIU short version)
This is THE best classic song remix ever made by far, and a consistent Top 3 most played song on Pump it Up games.
- TatshMusicCircle - FOUR SEASONS OF LONELINESS verβhttps://www.youtube.com/watch?v=7hZe0_kxar8Probably me whoring out songs I've just found out about. But this has been on "repeat one" on my schoolslaving commute way too many times. It just... touches your feelings, you know?
- Feint - Snake Eyes (feat. CoMa)https://www.youtube.com/watch?v=cvq7Jy-TFAUAn INSANE drum'n'bass song. This still gives me shivers whenever I listen to it.
- TwoThirds - Waking Dreams (Feat. Laura Brehm) (Drum & Bass VIP Mix)https://www.youtube.com/watch?v=_HLlb4Mu3ogAnother d'n'b insanity. This one isn't that hardcore, and has a more cheerful, happy emotion in it. I recommend checking out Laura Brehm's stuff, she's a really good singer.
- Lost Witness vs. Sassot - Whatever (Aly & Fila Remix)https://www.youtube.com/watch?v=mNn9ZTX6QO8The BEST trance music I've ever heard.
- 2playa'z - Tunehttps://www.youtube.com/watch?v=5QVz3t0bg3wThe BEST hardstyle music I've ever heard. If you don't fry up to this song you might not just be into music at all!
- Coldplay - Talk (Unreleased)https://www.youtube.com/watch?v=l-BN6gqoHaYUnlike the mainstream-poppy-adjusted crap that is the original version, this one has a "darker" melody in it, including different lyrics, that actually mean something!
- Talla 2XLC vs. Carl B. feat. Katie Marne - Giving Up Giving In (Sean Tyas Vocal Remix)https://www.youtube.com/watch?v=n71L6ybGfokWild Card, because I couldn't think of the 10th. But for some reason this makes me cry more often than I can admit.