here is some stuff i do
1. if it seems im coming out of character with a comment i try using a pic to strengthen the mental image in peoples head.
2.i dont always use pics.i make my personality more personlised to each person by them building upon my previous pictures and actions. what they think of me is what they imagine it to be + pics.
3.whatever happens in my threads is what i feel like. im not myself on these threads. im Ritsu.
maybe these helps you. i dont even know if it works well. its just some things i think help. maybe they dont