Such pretty things, all the shiny baubles. Being only a sporadic, recreational beader, I like Bead World best of all the 7 or 8 beads shops I've visited in the valley because 1) it's close. Every other shop is in out in the 'burbs; 2) nice selection of real stones, including large chunky stuff and many of pearls from dirt cheap to luxury: 3) it's small enough to have a personal feel, not the warehouse feel like at D&I or Beads Galore; 4) the staff are helpful and will give you one-on-one attention; 5) they are open Sundays; and 6) they have great classes! Not cheap (but they give a great discount coupon for beads afterwards), but very useful. I've taken most of the basic classes and actually learned stuff.
Bead World has a decent selection of single large beads, which saves a lot of money of you only want a few instead of a whole strand. The selection of man-made material beads (glass, etc) is pretty small - if you are looking for those, better to try elsewhere