you may want to do as some of the other big youtube names do:
crosslink two youtube accounts. one for gaming and one for tech/personal.
ie... greysontech can be crosslinked with greysongames.
if you plan on having a buttload of content this can keep things easier to find/view on the viewers end.
however if you only plan on a small amount of content... having one channel would be ideal. you could pick a neutral name.
you could use things such as hobbies, personal likes/dislikes, country of origin, nicknames, pet names, games you play, screenames, etc as possible ideas. as i do not know you or what you like... i can only make vague comments on what i think of what you listed so far.