I completely understand and agree with you. I often have people asking me to knit them sweaters. I explain that while I am happy to knit a sweater for them (provided they purchase the materials), I don't work on a schedule and it may be 2 weeks or 2 months before a finished product is available. It all depends on my mood, life, kids, etc.

My current project is knitting hats for preemies at the local hospital. They are super quick to do, and take very little yarn. It is a great way for me to use up odds and ends in my yarn bag. Plus, I get a nice warm feeling for helping a little one stay warm.