I worked in IT into my late 30's before going to school for some of the reasons you list. I got so much out of it. When you go back, you know which courses will directly help you, and you will probably learn many new things about where your strengths and weaknesses are. This is how your situation is different from many who enter college directly from high school who may not know what they want to do. Self learning on the job got me where I was, but the education got me further. Plus it really helped how I study and learn, so even the softer skills I learned prove beneficial today. Good Luck!