Aww, I can't even explain how much it makes my heart happy when people say Meg. Gusto is such a character that he is prone to drawing people in, but Meg is just so full of goodness and not everyone recognizes it.
Without putting to much rational behind it (because then I start thinking about things like 'well I don't think this one would get along with Meg'...):
Summer: Because I want a small dog that will snuggle all day long, but also will enjoy going out adventuring with me, and I believe she too has that internal goodness.
Zuma: Because she's physically the type I like, and I think she looks like a blast.
Quinn: Because she seems like the most wonderful, old soul, noble creature.
Gnome: Because who wouldn't?