Hey guys, wanted to ask a question

My name is sammy . i'm interested in cold approaching and have done many with varying success.

I have been reflecting recently . i have notice that when i play a character ; of a confident guy , with a low deep voice, witty guy. i get numbers and good dates. however i can never last very long in this "character" i get tired and then i don't get consistent. so i act differently.

Has anyone experienced something similar ? (also it's hard because normal me get very little results and fall into the nice guy frame sometimes)

what are your thoughts and advice