Categories: by genre or difficulty ?

[noname219]

You know the beautiful song genres we currently have ? (dance, dance 2, arcade, rock, classical, etc.) I would like to hear your opinion of what is better for the future of the game, what has the most potential, what could be improved, etc. between sorting the songs by genre (current system) or by difficulty (1-100, proposed system).

I've already read some opinions/ideas concerning the categories (here, here and here), but I would like to hear more about them.

Imo, I think we should stick with the genre system, because it would be less confusion for everyone and will keep that traditional feeling (but that's more a personal preference...).
The difficulty (1-100) system is currently more solid and reviewed frequently, and it would be easier to add new songs.
However, I think we should try an update to the genre tags before doing any big changes. That would be the very first step.