I used to imagine all sorts of scenarios with my figurines when i was younger and sometimes once in a while I'd do it now and then and then of course sometimes I get an idea or thought of some sort and write it down but for me, why I roleplay is because it is pretty much fun so long as it's not an emotional thing.

I mostly come up with an idea just by writing names down so it's a lot easier for me to roleplay any character i can come up with. I'll just vision it in my head and think of what they would say if i was them.