Most new players of no-limit hold'em find a version of the game they like right away and stay with it for much of their early poker development. But even within the variant of NLHE there are numerous options and game types — besides the different level stakes you can play — that are worth exploring in order to find the one best suited to your preferences and skill set.
Are you a loose-aggressive player who has trouble remaining patient at the tables? Are you on the tight side and like to minimize your battles, not minding folding a high percentage of hands?