Ninomiya Kazunari 11. Help Pls

Sketch date: 20070513

Sketched this last night before I went to sleep.
And again, due to no planning, I sketched this on my diary journal instead of those heavy-weight paper (failed again). Anyway, let's move on.

Now, I really appreciate your opinion please:

1) Should I continue to fine-tune, ie shade hard with pencil (my pencil drawing skill is kinda sukky.. no formal training as you can tell lol), or

2) Should I paint it with acrylic? (note: I sometimes paint this way, sketch it out and then paint, eg [link] also sketched and then painted on my diary journal)

And there's always the 3rd option,
3) Leave it as it is

I'm kind of leaning towards the painting part but then I quite like the raw pencil "unplugged" feel too.

So, your vote/suggestion is appreciated, thank you!

Btw, thanks for the other comments too, I'll get onto inbox later. Take care