Individual cut out letters really are the classic all rounder. Classy without being too showy, yet simple without looking cheap and run of the mill.
The marriage of typeface and material is everything. Acrylic, metal, PVC, wood....the choice is yours. Put these options together with a carefully chosen typeface and you have a sign that will convey your image perfectly.
Ideally these are fitted on nylon locator fixings which give a stand off from the wall. They can also be combined with other sign elements such as folded tray signs, which can also be very effective.