I think they're cool and they are both funny and bada**. They were made by people as tributes to a certain character:(more shall be added later on)

Pip:
http://www.youtube.com/watch?v=hvfwO_xW5Uo

Alucard:
http://www.youtube.com/watch?v=visOXTPWpv0

Alucard's Anti-tribute:
http://www.youtube.com/watch?v=Lk9TVmy-bk4

Walter:
http://www.youtube.com/watch?v=CxAj6WIdxoY
Young Walter:
http://www.youtube.com/watch?v=wXpNZen1_cU

Seras:
http://www.youtube.com/watch?v=mOBOjtxS3cU

Seras Anti-tribute:
http://www.youtube.com/watch?v=FWZE7HoWYVI

Rip Van Winkle:
http://www.youtube.com/watch?v=fKUlGlhJXvw

Schrodinger:
http://www.youtube.com/watch?v=GHJbLiTKhuc

Maxwell:
http://www.youtube.com/watch?v=01MhSkr6lg8
Maxwell anti-tribute:
http://www.youtube.com/watch?v=Hti4R0rmu5o