Memes are all I need

List fifteen of your favorite characters from different fandoms, and ask people to spot patterns in your choices, if they're so inclined.

Davos Seaworth (ASOIAF)
Nathan "Cable" Summers (Marvel Comics)
Len "Captain Cold" Snart (DC Comics)
Antimony Carver (Gunnerkrigg Court)
Wendy Watson (The Middleman)
Sarah Connor (Terminator)
Harry Potter (I'll let you guess that one)
Katara (Avatar: TLA)
The Lobe (Freakazoid)
Tyrion Lannister (ASOIAF)
Nicholas van Rijn (Poul Anderson's books)
Harriet Jones (Doctor Who)
Sergeant Jackrum (Discworld)
Buffy Summers (Buffy the Vampire Slayer)
Nathan Young (Misfits)