How many of you have Mains in each class?

I know there are some who focus on one class or really don't bother with other classes, but I've always found it useful to have mains in all three classes.

A pal of mine mains Thor, Strange, MK, CnD and Adam to be pretty well-rounded. Another friend has Cap, Iron Man, MK and Loki. I've got Peni, Wanda, Squirrel Girl, Jeff, Luna and Rocket.

What about everyone else? Do you like to focus on one class only or be well-rounded with each class?

(It's definitely a big help if you're lacking in one class and need an extra healer or tank for ex!!)