Driving makes me grumpy.
Well, that's not entirely accurate. I rather enjoy the act of driving in and of itself. OTHER DRIVERS make me grumpy. :3
For some reason, perfectly normal people turn into either incompetent boobs or jackasses the minute they get behind the wheel. Note that I don't exclude myself from this. I'm sure several people can attest to the fact that I get downright rage-y as a motorist. I just tend to express my jackassery verbally as opposed to crappin' up the roads for everyone else. XD
Then there's the construction. The NEVER ENDING CONSTRUCTION. That just makes things more pronounced. :<