What to do after to you get level 50?

[Noir]

Wtf, you get bored that's exactly what you do. No reason to beat around the bush.

The fact that this is all you took note of, out of what people suggested, probably says something. To answer your question, no they don't do anything practical. They are really more for bragging rights at the moment.

Well, I got ff xiii 100% platinum and got some stuff because of that for ff xiii-2 like a mask which I use with my chichu lightning mask I mean lol