Pets

what is best pet for lvling?????
Whichever one you can stand to look at for 75 levels. Look at Petopia for options, and Wowhead for talent calculators.

I've always preferred wolves, but that's just me.

Pets are in three categories, which affects their talent trees, Ferocity (damage-dealing), Tenacity (tanking), or Cunning (a combination of both).

Most people prefer Tenacity pets for leveling, and I've been playing around with a Hellboar instead of a wolf for this char, although my main is not a pet class.

All pets have a special ability (for example, wolves can increase crit chance, and boars increase bleed damage), which might also affect your choice.

It's all up to you, but leveling is so easy now, that no pet will make a huge difference in ease or speed of leveling.