Let me first start off by saying, If you like the GT, youtube, etc. KEEP IT. Don't get influenced by another persons dumb opinion.
Examples of OG's:
GT: Jinx
GT: God
GT: Red
GT: Tiger
etc.
Examples of Semi-OG's:
GT: Crafted
GT: Tigers
GT: Punished
GT: Stabbed
etc.
Not OG's:
GT: Golden Guns
GT: Yellow Car
GT: lol ew
GT: Amazing GWK
GT: Nike shoes
GT: Clean Trickshot
etc.
Remember. Just because you're not OG, doesn't mean your gamertag isn't nice. I felt like this had to be cleared up as some people still don't understand the meaning of OG for gamertags.
ps: Some name GT's are OG but some are only OG to the owner.