James Joseph Emerald said:
Do you vote? Why/why not? (I was going to make this question a poll, but y'know)
I find it to be a rather enjoyable experience. Makes me feel all grown up to go down to the local polling station and decide on the future of my nation.
I accidentally deleted your initial question, but I'll answer it first (to the best of my ability).
The very first post beneath yours already mentioned one reason - work day, no day off. This functions to prevent a lot of low-income individuals from voting because, to misquote House M.D., if you're working minimum wage, you really can't afford to take time off or risk pissing off your boss by calling in "sick".
Secondly, one major aspect is this - Districting. If you aren't familiar, American has a fairly bizarre system of slicing up areas in really strange ways. I'm not entirely up to date on the exact mechanics of how it works on a vote-by-vote level, but basically politicians will draw the voting distract map all wonky so that certain groups of voters are counted together while others are broken up. Depending on who is in office (and the level of corruption at that time) you get different political groups messing with the districts to favor themselves and harm the opposition.
I had it explained to me once, but that was some time ago. The basic idea, however, is that if you are a "minority" - politically speaking, I mean - in a given district, then you might as well not vote because the districting has been designed to screw over your group in favor of a different group. Again, this changes with various administrations, so political minority in a given district might not reflect actual minorities or political minorities state wide.
Thus, if you know that your vote can't possibly overpower the districting, why bother wasting your time?
Thirdly, the two-party "system" basically means that, if you are a member of a party other than the main two, then you can pretty much count on your vote meaning nothing.
So yeah - that's why a lot of people don't vote.
Now, to answer your second question....
When I lived in a heavily Republican district, no, I didn't vote, because my side was going to lose no matter what.
Now that I live in a more even (but leaning Democratic) district, yes, I do vote, because my vote actually helps tip the scales to my side.