She's usually fantastic but was inexplicably shit in the last episode.
She's okay as far as I remember but I have to catch up on the show yet.
She and Dipper work together. You can't have much Dipper without Mabel and much Mabel without Dipper. They are equally balanced. Also, she manages to like girly things without being a stereotype used to sell shit
Kind of fun until I started watching the show a bit more. Watching the program's reruns, whether of earlier episodes or of the the more recent variety, she's insufferable. Always squealing and yelling, annoying and incomprehensible, she's only part of the solution if the antagonist slips up or has contrived an ironic fate for him/herself. She has the intelligence and disposition of a five-year-old and is cognitively incompatible with every other character in the whole series.
I hope she dies.
Also, moe Mabel.