Yep, all depends on your riding style and your weight, and most importantly what feels "right" to you. Pump your tyres up to about 35 psi then gradually let them down until they feel good and aren't you aren't rimming out on walls/ rocks/ whatever, it's usually a good way to establish what you like... For example, I run 50-60 psi on my 24", friends of mine run 15psi on their TGS bikes - all personal choice dude!