As most people know who know the breed or who watch dog shows... Border Collies are a somewhat divided breed. On one side of the spectrum is show Border Collies (often referred to as "Barbie Collies"), and on the other side is working Border Collies. The two breeds tend to be shockingly different in appearance and in temperament.
So, honestly, which is you favorite and why? Ethics aside... if that's possible... which as far as appearance and general personality do you prefer?
Show Border Collies - Typically sporting a much longer, finer coat, a wider muzzle, larger eyes, rose ears or low-set ears, a stockier build, and a more easy-going & friendly (by friendly, I mean more tolerant and agreeable with strangers) personality. USUALLY much less herding drive.
Working Border Collies - All varieties of coat... almost always much lighter & more weather-proof. Longer muzzle, smaller eyes, lighter build, all ear-sets and often prick eared, keener expression, smaller height/weight, more suspicious of strangers, more athletic, & more problem-solving skills. MUCH drivier and more desire for a job.