Me
There's several reasons why I like Brandon, but mostly he adds a lot to the story and he's the best friend of the main character.

Kathy Claes
Because he is cute.

Nora M
Ok let me think... He had more c@#p happen to him than anyone else in the show. He's an intense individual that has his body stolen. He was injected with these little nanobots things that turned into a ghoulish look skeleton. He was cloned by Simon Grey and got his body back. And finally, he scared the willies out of Dr. X when he took control of X's trilobugs.

Shadowrunner
I like the person he is. His attitude, the way he does things and why, the way he thinks...