Its a very artificial question, because you can not choose to be lucky, but you can choose to work on your game, so you become more skilled. Also "being lucky at poker" is not even possible, if you want to play a lot, because then the luck element AKA variance will gravitate towards the mean. But if you could actually choose to bink one big tournament Cris Moneymaker style, then that would likely be preferable to being skilled, since you could then win life-changing money in a few days and choose, if you even want to play poker ever again.