I totally agree with Minzy.
Also, constantly changing your Nicknames, which is common on some Forums.
Really, those Name Changes mostly lack originality, and nobody knows who you were again, especially when people start a fad, where at least 10 or more people change their name into, let's say, "Link".
You'll get stuff like "Link Master", "Link1337", "ShadowLink", "___Link___", etc.
I mostly hate Nicknames with some (platform-specific or Font-specific) Symbols, like hearts, cakes, Paedo Bear, Play Icon, ":3", etc.