When I was younger and got AC Wild World for the first time I actually made a male character and gave him some random name. I used to always use male characters cos I sort of grew up with playing male characters (since you couldn't choose your gender in the first Pok?mon games). I changed that after a while though and since I use female characters I usually go by my real name or my nickname.
I went through a phase in Wild World where I just used names of characters I liked and so forth, but I really like playing with my name in a game like this because it feels more familiar that way, and there's no feeling of 'datedness'. And it always fits. I like my name, so why not?
My real name, Empress Sassypants, won't fit in the space given. I've been playing an online game for years (since 2004) and my nickname there was "Des" (awesome part, new people in chat would assume I was a guy). My really good friends would say "Des ILU" and VOILA I became Desilu on pretty much every new thing I played after that. (Cloudkitty was my very very first internet name from pre 2000, and actually refers to Cheetor from the Transformers)
I used Angelc in WW and CF, as it was a old screen name I used when I was younger. I transferred my WW person to CF, so I had to keep the name. Seems silly now so I'll be using my real name, Amy, in New Leaf
I have always been Lauren but for my storage ones I will most probably make them CRAAAZZZYYYYY like Bob or Janet, y'no mix my currently CRAAAZZZYYYYY life up!
I always use my real name (Lola), because it makes me feel as if it's really ME. As if I'm having a real cute little double life. :3 I don't like using other names, because it always starts to bother me after a while and feels less "real".
It's just me playing, so I've always used my name - Erin. I've used other names in the past, but only if I created multiple characters for the purpose of using their houses as storage. I'm not sure if I'll be doing that in ACNL. I'll have to see if I run into trouble once my house is fully expanded.
I used my screenname once in an Animal Crossing game, but it looked so out of place that I deleted the character. I let my sister name my Wild World character, and he was called Quince, and now in New Leaf, I am known by my name in real life, Zachary.
I've only used my real name in games a couple times, it's really cool when I do though! But for this game I'm using Lux uvu It's the same name I gave a character in another game I've played (Harvest Moon a New Beginning), I tend tot reuse names a lot ^^"