I tend to use only water actually, my hair seems to benefit from irregular washing and becomes much more manageable and weirdly... less greasy.
Tend to use Shower Gel to wash my hair when i do though. That Shower Gel really is the Duct Tape of the Bathroom world, seeing i use it to wash myself, wash my hair, and as shaving cream (shaving in the shower works for me), it's really just a shame you can't use it to clean your teeth.
Apart from hardware, and by that i mean... beard trimmer, razor and toothbrush... you don't really need much more than Shower Gel, Toothpaste, Deodorant and if you are feeling ritzy, some Aftershave.
I really don't get why companies are trying to sell cosmetics to men, i mean, i'm personally baffled at how many different types of body scrub you need to scrub with if you're female, and why it having apricots makes the foggiest different.
One of the greatest skills a bloke has is the ability to be asleep one minute, and ten minutes later, had a shower and had breakfast, and that doesn't leave me any time to moisturise my elbows.