Suggestions for Sketches, Practice and more!

Hey everyone! 

I'm feeling like making a stream soon, this week or next!
Just for practice purposes, so i thought about asking you for suggestions! 

We are talking about single images (no comic or sequences)
Maybe some mid transformation stuff, fan art, cosplay or crossplays.

i will pick some ideas from here! 

As usual, just one suggestion per person (since i will pick some randomly) , feel free to comment on other suggestions, and those with more likes get more chances to be chosen!