I think it's probably an alright game, but I guess for me there's just more interesting games on the 3DS that I'd rather play, right now at least. I have only had my 3DS for about 2 months, and I have 3 games for it atm - and I have a ton to do on those. There are a bunch of other games I'd like to get someday, but Bravely Default isn't even in the top 5.
I did enjoy the 4 Heroes of Light when I owned it though, and the game is probably good for someone like me. But I think character customization is something I've grown to like having in RPGs with games like Dragon Quest 9, and otherwise I know the kinds of things to expect from a game like Bravely Default. If it were a deeper or more graphically impressive JRPG, something more refreshing, then I might be more interested. But that isn't the case.