That's been my go-to theme in the past as well. I like to think I'm more inclined to roleplay science fiction, but I suppose most of my previous roleplays were more fantasy orientated. You're most definitely right about it not being unlike a muscle that needs to get into shape. 

If you feel like doing a more casual roleplay ("casual" in the sense that it's slower paced and won't be demanding on your free time), let me know. :) I started up an Interest Check thread for a werewolf roleplay, though I'm down to start up pretty much anything with you. EDIT: Oh! I see you already found my thread! You are one step ahead of me, girl.