I've played it before but didn't finish it, and now I want to try again, but I've forgotten quite a bit about System Shock 2's mechanics. What I could use a refresher on the most are stats/skills, as I don't quite remember what's useful and what isn't. I remember Maintenance is better than Repair, that Strength is good for inventory space & melee, Standard & Heavy Weapons are generally better than Exotic, stuff like that.

Thanks in advance!

My tip for a first full play through, is go Navy with a mix of weapon skills. Mix hacking skills and weapon.

If you make it through that, go psi on 2nd run. I found psi a good one to go once you fully get how the game works. Mix in hacking skills where needed.