I started out with metal backed plates and magnetic bases at school, but I’ve switched to using sticky-backed plates on an aluminum base now. I just find them easier to make small adjustments, since they don’t ‘smack’ down onto the base, and I like being able to see through them when putting them in place. I also like the flexibility of the plates, so I can lightly attach them to the printing paper and place them on the base by tripping the carriage.I’m slowing adding to my collection of plates, and they’re also much lighter, and take up less room than metal backed plates as well.