The most important thing to consider when you buy ski goggles is whether you will be able to see properly, especially if you wear corrective lenses. For those who don't wear eyeglasses, regular ski goggles are a good choice. They are smaller and more compact than the goggles which fit over your glasses.
If you wear eyeglasses, over-the-glasses (OTG) goggles are the best option. Remember to bring your glasses with you to try on goggles, if you plan on wearing them while skiing. If you are wearing contacts while ski goggle shopping, keep in mind that you may want to ski while wearing your glasses, on occasion. When that's the case, you will need the larger-sized over-the-glasses goggles.
There are a wide variety of goggles in all price ranges and in differing tints. For your first pair look in the $40+ price range (maybe a little more, if you buy OTG). Tints are for varying sunlight conditions and the tint determines how well the contours of the mountain stand out. Yellow or yellow/brown tints are the most popular and will work well in all levels of sunlight.