If you are a beginner, and you want to build up your speed gradually you can take bearings like BullsEye, MiniLogo, Gravity. If you want less friction (more speed) you can take the Bones, Oust, SKF longboard bearings, Pleasure Tools or the Bears. If you want the fastest and smoothest rolling bearings, you should go for ceramic bearings. (only choose ceramic if you're not planning to do any high impact like big gaps, stairs, tricks in general or power slides)