Mic technique is IMHO more important than mic type, I'd concentrate on being a consistent reasonable distance away from the mic with it pointing *at* your mouth. Vary pitch rather than volume with your voice to communicate excitement. I have a naturally deeper voice myself and find keeping my thumb extended and just touching my chin enables a consistent sound without having to remember to maintain that constant distance:
(yes, there are nicer looking models but I knew where this picture was... :)
The sound person should be able to then adjust the tone controls to match your voice (probably reducing bass and possibly boosting highs).
