I completed my bachelors degree in 1969, when i was 27 [after flunking out of a couple of schools]. After working for a few years, i came to the conclusion that i needed a Master's degree [in electrical engineering], in order to maintain my employability. I started graduate school when i was 38 [in 1980], and finished my MSEE in 1987, when i was 45. I found that deciding to go back to school was a sound decision, and benefited me professionally. Best of luck to all who decide to do it!! Unlike undergrad school, i found that grad school was peopled with more serious students, who had a better idea of what they wanted, and how to go about getting it. Cheers.