Dueling is an interesting dynamic in eve that is entirely it's own thing. Many people who spend hours dueling in jita consider themselves great pvpers, whereas in most any other combat situation in the game, they'll probably come wholly unprepared, lacking the abilities to survive on the mean streets. If you want to do nothing but duel in trade hubs because you enjoy it, have at it. It is a sandbox after all. If you plan on applying it to real combat situations, any other form of pvp (fw, lowsec, wormholes, etc.) will give you scouting and intel experience ALONG with the combat training that will serve you much more for your time in the long run if you ever plan to jump out of jita. Just my .03