I don't actually play Cardfight Vanguard! per say, I just admire the art on the cards. My favorite clan, and if I did make a deck, would have to be Pale Moon. I honestly don't like the circus, but I love these cards. I think it is because there is such a diverse mix of creatures and beings, allowing for a plethora of possibilities. There are cute ones, creepy ones, cool ones, funny ones, gothic ones; There are humanoids(elves), monsters(demons), animals(both natural and mythical (aka High Beasts)), just so many things you can do with the designs.
Please feel free to discuss Vanguard! to your hearts' content.