Got a favorite dog breed? Which one and why?
I had an Australian Shepherd
The smartest and most loyal of all.
Out of all the dogs I've had or been around, our mini Aussie Dolly is the smartest and most well trained with virtually no training at all.
The breeder we got her from had her potty trained at 8 weeks, not once has she **** or pissed in the house, when it's time to go she lets me know.

Blazer, our pure bred American terrior was a close second, I got Dolly a week after I had to put Blazer down, he made it 13 years.