I got mine from when I used to be really into Anime and I thought it was cool to have an Anime username.
I still like it I guess but it doesn't appeal to me as much as it used to.
I got mines from playing gears of war 2 and 3, I was the only one who can get host every game , literally played like 5000 matches and lost only like 7 and was host every game. Nobody in any country could pull host over me. Even if I play in random country servers. So I decided to use that as an alias. However host was taken so had to use The Host on HF
My alias was Frozen on here, born/live in Alaska so you can see why for that. Now my alias False, liked it when I seen it on someone's list of non taken names. Other words, no real meaning/attachment just looked cool