I recently turned 18 and started the revolutionary when I was 17. I'm probably a month or two away from having it at a performance level.
In regards to Ranakor's question: It sort of depends what you mean by the "easiest." It's highly subjective, obviously, but my opinion would be that the slower etudes are among the easiest ones. Though they do require a lot of cerebral playing (as all the etudes do) they require less finger dexterity and coordination than most of the faster ones. So, whenever you're ready to try one in 5, 10, 15 years--whatever--I'd recommend looking 10/6, 10/3 and 25/7 (though the last two have some very difficult fast parts). For etudes that aren't slow, I'd say that 10/9, 25/2 and 25/9 are fairly manageable (I've fooled with all of them). People (like myself) often start with the revolutionary (10/12) because it's so popular, and quite impressive to an audience. I wouldn't say it's the easiest, but it is on the easier end, and you could always consider starting with that as well.
All that being said, the entire repertory of Chopin's etudes range from early advanced to very advanced/virtuoso. Playing either 10/2 or 25/6 (arguably the hardest) is considered a major pianistic accomplishment. None of them are easy, but if I had a student who didn't know where to begin, I'd introduce him to 10/6 first.