Jackson's got a full tail and I love it. I've had no issues whatsoever. If there were issues with a full tail then they would dock every breeds tail. I prefer the full tails because then you don't see their bun-hole sticking out all the time lol
Actually, yorkies probably don't have that problem 'cause they're so small but the Boxers I dogsit, their butt hole is always just... THERE, and it bugs me LOL.