I'll craft something with no regard to price if I think I will be needing it soon on one of my characters. I do this so that I can't sell it by accident. You can sell any recipe at a vendor with one mis-click. Crafted enhancements can not be sold at the vendors.
If I decide later that I don't need it, I'll dump it on the market.
Paragon City Search And Rescue
The Mentor Project
I don't spend the time to evaluate recipes, I just craft everything that drops. Unless it looks like it's valuable, I list it at 1.