[@The Mad Hatter]Yeah, I'll give a more complete response to anyone of these things later if you require it, but at the moment I'll address a few things. In regards to the skills, this was a state of me thinking more than I was writing. His blacksmithing is best in the village because I made the assumption that the blacksmiting in town would be below average, and I was incorporating some anime logic with the blacksmithing thing, so I'm fine with that changing so that he just has more of a knack for it than most.

I think I saw that explained in the show somewhere that those who come from ninja families are more likely to have larger chakra reserves than those who come from a civilian background. Could be wrong, but it makes sense to me that, if your family have been using chakra for generations, it would gain a certain affinity towards it.

Ken juts just means he knows how to use a sword, no real techniques to it, though to offset it, I'm fine with making his taijutsu bad and ninjutsu average( only thing that made it about be is that he just had more chakra to burn though, rather than being above average in his skill with it.)

As for the body thing, I've always been bad at describing body shapes. What I'm thinking of is that he's got an ectomorphic frame, but his work has made it so that he's gained some muscle.

Being born outside the village is just for story reasons, as their would be know reason for his mother to be in Gobi at the time she was to give birth to him. Kekkei Genkai possibility is partially because I wanted to talk to you guys about it first, and also because I wanted to have him discover it later in his life, similar to what was discussed earlier for the secondary natures. His life in the village has been mostly stress free and, since he was never told of the possibility of him having a Kekkei Genkai( his family heritages were kept secret from him with his mother changing her last name to Kajiya, which is more well- known in Kiri than other nations/villages). Gobi was chosen because it was isolated from the rest of the world. 

I actually was wondering something about the natures: should he have learn to use both fire and earth in order to use Lava, or could I start him off with earth and have fire come to him when he discovers Lava, if he hasn't discovered fire already by that point. 

Fuinjutsu is extremely basic, mostly a set-up for when he learns his family's style of engraving seals into their smithing, something I planned to happen later on when he meets his father, who would continue on where his master left off, hopefully.