What character is worth getting?

[Sandman77]

Violet rocks, i ordered Lone Ranger set!

Dash is pretty cool, Violet is probably the strongest besides Mr. Incredible, and all of the cars are interesting, especially Mater, so Violet or Mater, with the Cars playset. That's what I would say.

Hope it helps!

Thanks everyone for commenting so far It really helps a lot. So the current answers are:
SINGLE: Violet/Mater
PACK: Sidekicks
PLAYSET: Cars
I think I might get these, What about Mater and Francessco? Do they have different powers than Holley and Lightning?

No, you don't need them unless you like them/you want all of the figures.

I fit in both categories.