http://www.youtube.com/watch?v=whtNHRYJnrU
I lolled!

I beat the game as stealth/pacifist on hard (which is too easy). I used non-lethal takedown for 80% of the guys and I avoided the other 20%.
The non-lethal takedown works on two opponents with just one energy bar. I barely ever used consumables, just combat rifle ammo for the imba boss fights and the occasional tranq dart.
I never used any hacking aids, I stopped trying to collect them after I got like 50/50 stockpiled and I always hacked everything until I got bored with it (I hacked all the offices in the Sarif building, and terminals in the locations you visit, including the police station).
If you sell your items right you can make a fortune that you can't possibly spend, especially if you don't use any ammo or weapons. I finished the game with more praxis points than I wanted to spend. If I wanted to I could sprint unheard and unseen for 28 seconds (which is a little OP, but useful in the last area).
You don't really need to spend any praxis points other than on level 2-5 of hacking and the node detection reductions, the other augmentations just make everything more convenient (like sprinting). Spending some praxis points, like on wall smashing, higher jumping and fall protection allows you to access hidden areas with even more praxis points.
For the ending:
I choose to suicide and destroy Hyron
Malik:
I didn't manage to save Malik, I did find her (pristine!) lifeless body in Tong's Harvester OR, sadly no dialog

I thought Sarif was a real ass.