Styles:

I have a soft spot for most eurodance from middle/late 90s, spacesynth and Italo Disco of the 80s. Jarre had some really nice things going on in the 70's and 80's, he was a big hero. Some parts from more contemporary genres like house and trance. Some movie soundtracks can be inspiring.

Artists/bands:

E-Type, Sash!, Scooter, Darude, 666, Brooklyn Bounce, DJ Quicksilver, Gigi D'Agostino, KLF, L.A. Style, Jean Michel Jarre, Hans Zimmer, Harold Faltermeyer, Mike Oldfield, Laserdance/Koto.
Of course many of the retro heroes like Hubbard, Galway, Draxx, Thomas Detert on the C64 and Hippel, Hülsbeck and Brimble to name some of the Amiga heroes.
Many of the remixers at RKO/Amigaremix: Sonic Wanderer, Hazel, O2, daXX, Amok to name a few.