Not liking either candidate isn't an excuse to not vote. People have the mindset that the R and D candidate are the only people on the ballot.
If you don't like either, toss a vote in for the Independent, or Green, or whatever other minor candidate is out there you might agree more with. Or like PD said, write yourself in and submit it. Every election they report about 100,000 people do this as "miscellaneous one state write-ins"
I seldom comment on political issues, but you are absolutely right. There is little difference between parties. At least let the Gov't know you're not happy with a two party system. I don't want the job,(but bet I?d do better in most area's than the last 4 elected) Our troops would be guarding OUR southern border instead of being the world police, on a lot of missions with limitations that get them killed more often. So, independent is a choice.
Steve-o