Pros:
-Virtually no taxation and heavy subsidization if you're making <$25k.
-Very high access to quality healthcare.
-Wide cultural diversity, well-developed cultural production.
-Virtually 100% access to quality K-12 education (maybe not the best, but it's not that bad).
-Hosts some of the most prestigious post-secondary schools in the world.
-Very large supply of educated citizens to employ in service sector.
-Relatively free media, I guess.... which seems a shame on everyone's part.
-I think Justin Bieber came from Canada rather than here.
Cons:
-Next to Canada. Bieber just walked right on over
-Social immobility from extremely progressive tax/welfare system. You can work 200% more, but only make 115% more at the end of the year unless you're paid an exceptionally high hourly rate.
-Cost-inefficient healthcare system, low life expectancy.
-Very high homicide rate and prison population.
-War on Everything by means of shoving so much money down the problem's throat, we imagine we must be killing it by choking it to death.
-Government's long-term plan for preventing economic collapse is inflating debt away.
-Extreme import reliance, consumer nation relies on 3rd world & developing countries to work so we can eat. Mining, manufacturing, agriculture makes up ~15% of total US GDP.
-Piss-poor Internet infrastructure, crumbling roads, a train system I can't imagine is worse anywhere else on Earth.
-Over-educated population - very difficult for uneducated to rise above class they were born into, while educated also have little chance at generation-over-generation success due to extremely progressive taxation.
-US military adventurism, blood on almost everyone's hands.
-US immigration & drug policy, among other shameful government policies with effects ranging from unnecessary deaths to destitution to no, really, I need a freakin' passport to walk a few blocks to Canada, now?
-US domestic spying, arbitrary law respected only at will by government