Okay so I thought I would post this because its something I'm thinking about at the moment.
How do you pick the next champion you want ? Do you just find the "current OP" like Darius or Diana were or do you pick an older champion with a kit that seems fun that you will keep playing no matter what the meta says about them?
the obvious answer is the second option but the issue for some people is that said champion with an amazing kit might not fit their best role, i.e. a solo top player picks Lux, finding out she doesn't do well and then calls her UP.
of course this example wouldn't be real as most everyone plays Lux mid or support. But it applys to other champions in a sense, now what I want to say is this shouldn't matter, as everyone should know where X champion plays (except for new players of course) now this means if you find an amazing champion with a kit that you like just buy him when you can, learn his/her main role and play there.
this applies to the new champion as well, as many people feel the need to play Thresh as a top or mid laner where he excells as a support, but thats the target of another post that I'm probably not going to make