Some thoughts
blocking at c17 should be better, making a base for yourself while denying one to white. D17 is not a standard approach and w should end with a worse position than black (Shusaku's kosumi is when white approaches at e17). 
black's stick in the upper left probably needs something more to be happy. Maybe an extension along the side? Although that would let w play the hane at g16, so maybe b playing here or at g17 would be better (maybe b should have played 13 at G16 to keep ahead of white). The two black stones in the bottom right could wait because they can stabilize either by extending on the right side or by playing p3. If black plays here first anyway I'd play p3 which "punishes" white for not extending on the bottom side ( lets w play around o3 first so w hasn't paid for his tenuki to d17).
The extension to G-16 is big.
It still is. But so is the attachment at P-03, which is the sharpest play.
Good!
The solid connection looks better.
Q-14 is more severe.
Does not threaten much. G-16 is better.
Looks too close to your strength. G-16. Also, at some point D-06 looks good.
I still like G-16.
Given the weakness on the left side, the jump to E-10 looks better. Also, G-16. 
K-16 is more severe.
Good!
Not very big. Maybe K-12?
C-12 is usual. The attachment strengthens White.
To strengthen yourself H-03 is better, which blocks off the side and threatens to capture a stone. But the severe play is L-07. Can White live? Make him prove it.
K-09. Go after the White invading stone -- bigly!
Now how about R-13, S-13, S-12 (crosscut). Black can grab territory. Big.
Too late!
B-09. Big.
Locally the 2d line clamp. G-02, is better. But B-09 is still there, as is S-18.
P-18 is better, as it protects against W Q-18.
F-09. Coup de grace!
Last chance!