I'd say I'm fairly picky, not as bad as some, and not entirely limited to junk food as I've found one or two vegetables that I like in certain ways. I do make it a point to try new foods from time to time, and occasionally it does work out and I'll have that thing more, but most times, I just end up not liking what I've tried. It's not always just a matter of being too afraid to try new foods, sometimes one really does just not some popular flavor or ingredient or texture, and if some of the things one dislikes are very popular and common, that's going to limit what one likes a bit