If you ask for your boss's opinion of your work on old projects, his opinion could easily be that you are dependent, insecure, and needy. While he should have provided you with feedback after you gave him your work, there could be any number of explanations for his failure to do so.
Perhaps his managerial skills are marginal and he does not understand the motivational impact associated with feedback. Or, perhaps he believes that these additional projects are not of major importance and neither you nor they require much follow-up. He could just be extremely busy, or he may even be trying to send you a message.
The best steps to take in this situation are on future projects. The next time you complete one of these assignments for him, let a few days go by and then follow-up and ask if your work was what he wanted or if it needs some fine-tuning. With this approach, you do not sound like you are groveling for recognition, but only trying to make sure that your work was helpful to him.
Just as you would like some feedback on your work, it sounds like your boss could use some feedback on his managerial style, and this is actually a way to do both.
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