Well,my case is slightly different,´cause I don't usually speak English in my day-to-.day life; but I do the best I can...
Besides of finishing my questions with a "huh?"-it's not original...-,sometimes when something that has happenned to me is good,I express my joy with a "Yeehaw¡",just like Jack in the dumb-ass missin´scene...
The problem is that my job is commercial agent,so if a client sign a contract it's not a good idea to shout at him/her like this-even to show I'm grateful to him/her; the client can think I'm crazy and break the contract¡ OMG¡
I also say or write "You bet" when I agree with something,even if the person doesn't understand what I mean...
Or I call my good friends"little darlin´".
All this is almost an heroe behaviour,because I use to speak in Spanish or in Catalan in my daily life¡.