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People have costumes that look like they have taste
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/agree.
A tastefully done, color coordianted costume shows that the player cares about the character, at least enough to not make him look like a goofus.
Also, brief character bios that are not littered with errors show maturity, and maturity is always welcome in a PUG.
A quick story: When I first started the game (04/2005) I rolled a blaster and an Emp Defender. I soloed my way to the Hollows, and joined my first team there. 6 people and I was the only support character.
We suffered one death (Leeroy Jenkins wannabe tried to draw angry mobs back to us, but was killed en route. Kicked, good riddance.) Afterwards, everyone thanked me for my timely heals. I told them it was my first week and it blew everyone away.Excellent team, but I never saw them again.