So wanting to pay for what you consume is "anal"?As has been mentioned, I don't think most people will bother over a couple dollars, but adding $10, $20, or even $50 onto your bill to cover someone else's "mistake" isn't exactly nice.
Separate checks simply eliminate anyone making a "mistake" on calculating their portion. To me, that's much less stressful than having five different people try to figure out their portion of a single bill, and factoring in the tip.
There are plenty of ways to pay for what you consume without coming across as anal. And sorry, to me separate checks seems to be the epitome of anal.
I've never found dining out to be "stressful" and I guess our dining companions just don't make significant mistakes. But if separate checks are the norm for you, great. Have fun and enjoy your dinner, down to the penny.
As has been mentioned, I don't think most people will bother over a couple dollars, but adding $10, $20, or even $50 onto your bill to cover someone else's "mistake" isn't exactly nice.

Since I'm not hitting the early bird at 4pm, I'm probably a little adverse to the Seinfeld parents and their friends way of doing things. 
Never went out for a meal with that one again 