It really depends on a few things.
1. Comfort. Diapers must be comfy. Try to find one that fits. There are websites that will tell you how to do this
2. Discretion: that is to say are you trying to keep your diaper wearing secret or not? If you are, cloth or cloth-packed diapers are better.
3. How much use are they going to get. Personally i very rarely wear since i is older little and when i do it's for the feeling of comfiness. However some littles go all out when wearing. If this is you find something that can handle a good amount of liquid. You do not want to be leaking.
Personally i lie abuniverse when i do wear