[quote=@Disdain]
<Snipped quote by Webmaster>

How many siblings do you see out there that are just... good friends?
-Spectre- And how many teams do you see out there with powersets that fill out each other's weaknesses so well?
[/quote]

I see some of the first and fewer of the second. There are some that complement each other's strengths at the cost of shared weaknesses.