Yeah, when I wrote this I had been playing a fair bit of Shadowrun and was really into the way dice pools felt to roll. I wanted to break away from the D20 homogeneity, plus the idea of rolling a bunch of 6 sided dice felt right when the number 6 was so important in the game.
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Oh yes, im a fan! I personally am kinda done with d20s and have moved on to lots of other systems myself. As to the d6 and the 6 theme- you could do something even more clever but it would mean reworking the system some. In Year Zero SRD they got two systems, one of which is a d6 pool system too but success are only 6s. So you only need 1 for normal success but you have to score a 6 to do it. It makes things more intense and brutal but fair enough especially if build a PC towards the certain skill. Just a thought but your game is pretty balanced already.