I have no idea what motivates us, or me.. I'm not very motivated to do anything right now. I honestly don't want to do anything, I just want to listen to some music and close my eyes.. And sleep, I'm pretty lethargic.
What demotivates me though, is alot of things. Take the school I'm in now (it probably compares to US college) I rarely attend because I don't like the people there, nobody wants to debate, to to give me perspective, the minute someone has an opinion which differs you're just marked as "that annoying guy who argues with everyone" Sure I argue alot, but I want to debate, not argue - Thesis + Antithesis = Synthesis, is pretty much the principle I run my life on.. Not alot of my peers do the same. Which is why I have absolutely no motivation, they bore me.