Obviously it's a super-condensed list, but they're all songs that either opened up worlds of music to me and influenced what I listen to now, or just stick in my memory for whatever reason.
They're listed in roughly the order that I would have found them.
I was pretty sheltered, I've only been listening to music for ~11 years so I found a lot of things out of order Either way, here we go:

Ravi Shankar - Rupak Tal
Timo Maas - Der Scheiber 1
Total Eclipse - Psychedelic Terrorist
遠山明孝 - The Moon and the Prince
Raico - 空カケアガル
Room - Rubb
Ryu☆ - rainbow rainbow
IOSYS - Marisa Stole The Precious Thing
De Schiedamse Schutters vs. Krimpens Gewald - Pokeherrie
Rotator - Black Flag
venetian snares - Második Galamb
ship going down - skabrös räpa
Skrillex - Scary Monsters and Nice Sprites (hey, it had to be something)
Project Serendipity - Shriek
Igorrr - Tendon
[Eprom - Center of the Sun] (bonus track)
All of these are on youtube, I know you're not too lazy to copy+paste!

So as you can see, lots of experimenting and discovery in the beginning, finding music I actually liked rather than music that was forced on me.
It tapers off towards the end because I've settled into a good personal blend of genres, with an appreciation for just about anything.
Dance games and its online culture have *a lot* to do with this list.
I could do waaaaayy more than 15, but hey, couldn't we all.

Tag yourself if you want~