3C is a great and I think very elegant game, more so than pocket billiards IMHO. Not that I play it much at all, but I really enjoy watching it, I wish I understood it better, some of the shots just look like randomness with me and I can never figure out what is "good" vs "bad" position in the game.
I do have a high run of 5 though which I brag about all the time LOL
3C, 14.1 and snooker I think are the core games of cuesports. 8 ball, 8 ball, etc.. are great, but 14.1 and 3C embody the core essence of the game of striking round objects, one to move them around the table and the other to pocket them. Snooker is great in it's own way as a specialized version of pool that demands more in some areas and is different enough to be a separate thing to master.