I really like to see all of the different names in WoW. You can often times tell a lot from a character's name. You can also tell a lot from their guild name if you are familiar with a particular guild. Obviously due to naming rules on RP server, making a determination on a character can be that much more difficult.
It is usually quite easy to find the 10 year old players. They are usually Rogues name Deathlystab or Ipwnasaurus. Sometimes they are NE or BE Huntards called Leogalalas or Leegalas.
The twelve year olds are usually the ones who go by similar names, but with a "clever" guild name like "Your mom is my epic mount" or possibly "It burns when I PvP".
The absolute dorks will name their characters after something completly non-wow related. These names may include Darthjedi, CaptainKirk, or Aragorrne (be careful on this name as it may be a 12 year old dork).
I have a rule with guilds. I would rather run a pug a guildless toon than one in a guild where the name is spelled in all lower case letters. Guild names like "the great dark riders". That is an example from my server. The guild leader is a Huntard named Zapzapper. That pretty much guarantees I will never run with someone from that guild.
You cant always judge a book by its cover, but in WoW, there are a lot of times that you can. When in doubt about a group look at the name or the guild name. If it has fail written all over it, you know what to do. If it looks like a dog and barks like a dog, it is probably a dog.
What names do you guys find irritating? What are the worst guild names and toon names you have seen?