Yep, it took me a long time to get to that point. I used to get PO'ed quite often with other drivers, still do actually, I just respond differently.
I had a guy tailgating me a few years ago on a secondary road near my house. When I was younger I would have messed with him, but now if needed, I just pull to the side and let the fools go.
I did just that, and he roared off down the road, he got about 3/4 of a mile ahead of me and a huge deer came out of nowhere and took him out. Totally destroyed the front of his car, rendering it un-driveable. I just honked the horn on the way by. :D