I made my shop wall cabinets out of melamine. I used the "confirmat" screws to hold the carcase together. The doors are mdf with some routed detail to look like kitchen cabinets. They are european style (no face frames) with euro hinges. I coated the MDF doors with polyurethane. After 15 years, the still look as good as new.
I kept the width down to 30 inches to avoid sagging in the shelves.