Painting Practice 2

As no one giving you a critique on this yet, I'll give you honest and straight opinion (that's why you like me, don't you XD) which you can call a critique if you want.
So, let's go from the very top as always. Hair ends should be okay this way, yet they can be upgraded by adding more sharp and thin lines, which should make the hair more realistic. This strongly depends on the level and style you want to give your painting though. In case of partial dyeing it should probably be done a bit further from the roots of the hair, like you did with the very left curl. Also you should probably really consider more hairstyles/dyeings, this should help to get better too.
More shading under the hair! Especially on his right cheek. Don't forget eyelashes even if it's a boy XD The shading around the eye looks solid enough, yet I would prolong it closer to nosebridge ju-u-ust a bit.
Study the iris, it's not a plastic toy XD If you want him lively, make it more detailed. Probably will be a good idea to outline the whole iris to bring more contrast. The whole iris might be just a little too big, I would make it closer, although again this depends on the style you want to give your painting.
The chin outline is solid. i like the under-mouth shading as well. The mouth itself is very good considiring coloring and shading, you've rushed it's shape and positioning though a bit.
The under-chin shading on the neck looks close, but try to make it more... even. I would really like to attach the Muro here to show you with arrows where exatcly, but I don't see it around. It's very true that the shadow is thicker the higher it's going along the neck with this perspective, yet it can't vanish that fast and have different thickness under his left cheek. Maybe more blending will help.
Considiring anatomy, I would make his nose narrower as well as his ear, moved the mouth more to his right side as well as changed it's perspective accordingly to this.
The rest of the vody isn't important here as far as I can see.

This is my vision, I hope it will help to bring more artistic Flames to your paintings <img class="avatar" src="a.deviantart.net/avatars/s/m/s…" alt="" title="smile-luplz" />