Dildos are all about variety. My wife loves her new VixSkin Johnny - quite soft and realistic. On the other hand we have about 10 glass - and don't forget metal - we have both steel and aluminum. All of them get frequent use. When it comes to glass experiment with smooth and textured designs. The amount of texture should be inversely proportionate to the diameter. In other words larger ones are better smooth and smaller ones with nubs or ripples.
Start building your collection - you'll want different things at different times. On a hot summer night - a cool glass toy can be fantastic. When you're feeling adventurous a large smooth glass wand with a g-spot bend is just the ticket. Just after her period when things are a little sensitive - a smaller glass toy works best.
Happy hunting - you've come to the right place.