Nico Nico Nii!~
Hammerlasertime and the Blastoise/Keldeo/Mewtwo/Black Kyurem decks sound like a lot of fun, based on my personal preferences.
What may help us pick for you is if you can figure out which player type you are. Since there aren't any such player archetypes commonly used in the Pokemon TCG community, I'm gonna borrow the MTG player types and ask you which of the 3 you think you are: http://www.wizards.com/Magic/Magazine/Article.aspx?x=mtgcom/daily/mr11b
Are you a Timmy, a Johnny, a Spike, or some combination of the 3?