Who is your most favourite and least favourite Harry Potter character and why?

Personally i love Severus Snape, there is so much more to him than
meets the eye and a lot of the plot of the Harry Potter books revolves
around Snape and his hidden characteristics. He is also a brilliant
potions master.

However, i cant stand Hermione Granger. She is just annoying, moody
and i don't know hoe Ronald puts up with her.

So who do you love, who cant you stand and why is this so?