Steelcan wrote...
You're an idiot if you refuse, not a villain. None of the options make Shepard a villain, unless you really really love reapers/synthetics and shepard picked destroy
Control - Makes Shepard space-god of the galaxy, an absolute ruler with infinite power and authority to impose their will, the emperor of man on steriods
Synthesis - imposes a horriffic implantation of all sentient and non-sentient, and presumably unwilling life in the galaxy, as well as leaving the horriffic results of Reaper experiments shambling about the place for eternity.
Destroy - Causes Shepards who specifically created peace between the Quarians and Geth to commit cosmic genocide against the latter.
Refuse - the only one in which Shepard does not comit some act of evil: s/he's just a colossal idiot