Everyone has different likes and dislikes. Also, there are good examples and bad examples of synth, chip, and redbook music out there.
For the Genesis, I absolutely love the soundtracks in Sonic 1 and 2, as well as Streets Of Rage 1, Golden Axe, and Jewel Master. Also, the Columns music is pretty good.
For the Sega CD, my faves include the soundtracks for Sonic CD and Eternal Champions II, as well as many from Vay and Lunar: The Silver Star.
For the SNES, the soundtracks from Final Fantasy 3, Plok, Super Turrican, Biometal (US version), Phalanx, and Super Mario World are great. Plok in particular has an amazing soundtrack...you'd swear there was a $3000 synth in that machine.
For the Turbo, Cadash, Neutopia I and II, and Ninja Spirit are my faves.
For the TGCD/Duo, my faves are Ys I & II, Lords Of Thunder, Gate Of Thunder, Exile I and II, Shadow Of The Beast, Dracula X...the list goes on and on and on...also, a couple tracks from Camp California are really inspiring, even if the game itself somewhat blows.