I recently picked up a copy of the LEGO ideas book, and been inspired. As a novice builder, I've noticed that almost every model makes use of tiles to provide a finished look, which seems like a great idea.
Accordingly, I'm interested in buying some tiles in bulk for assorted building projects, but I'm overwhelmed by the options. Bricklink has many kinds of tile. What would be a good starting set of tile pieces to aim for, and roughly how many? And what's the difference between tiles with and without grooves? Is the groove on the bottom? Is one piece much more useful than the other? Argh! So many options! Can anyone recommend a sensible way to proceed?