Chances of Success

I was thinking today on probability of success for a die system that uses multiple of the same die. Similar to Shadowrun, World of Darkness, 7th Sea, etc, I wondered what the actual percentages were for the various polyhedrons used in gaming. So I sat down at my computer and drafted up the following chart.

I am leaning towards a multi d10 system with a 9 or 10 qualify for a success. I'm curious, based on the chart, what other people like (please no d20 requests).

# dice	1	2	3	4	5	6	7	8	9	10
d4 Chance of Success
4	25.00%	43.75%	57.81%	68.36%	76.27%	82.20%	86.65%	89.99%	92.49%	94.37%
d6 chance of success
5,6	33.33%	55.56%	70.37%	80.25%	86.83%	91.22%	94.15%	96.10%	97.40%	98.27%
6	16.67%	30.56%	42.13%	51.77%	59.81%	66.51%	72.09%	76.74%	80.62%	83.85%
d8 Chance of success
6,7,8	37.50%	60.94%	75.59%	84.74%	90.46%	94.04%	96.27%	97.67%	98.54%	99.09%
7,8	25.00%	43.75%	57.81%	68.36%	76.27%	82.20%	86.65%	89.99%	92.49%	94.37%
8	12.50%	23.44%	33.01%	41.38%	48.71%	55.12%	60.73%	65.64%	69.93%	73.69%
d10 Chance of Success
7,8,9,10	40.00%	64.00%	78.40%	87.04%	92.22%	95.33%	97.20%	98.32%	98.99%	99.40%
8,9,10	30.00%	51.00%	65.70%	75.99%	83.19%	88.24%	91.76%	94.24%	95.96%	97.18%
9,10	20.00%	36.00%	48.80%	59.04%	67.23%	73.79%	79.03%	83.22%	86.58%	89.26%
10	10.00%	19.00%	27.10%	34.39%	40.95%	46.86%	52.17%	56.95%	61.26%	65.13%
d12 Chance of Success
8,9,10,11,12	41.67%	65.97%	80.15%	88.42%	93.25%	96.06%	97.70%	98.66%	99.22%	99.54%
9,10,11,12	33.33%	55.56%	70.37%	80.25%	86.83%	91.22%	94.15%	96.10%	97.40%	98.27%
10,11,12	25.00%	43.75%	57.81%	68.36%	76.27%	82.20%	86.65%	89.99%	92.49%	94.37%
11,12	16.67%	30.56%	42.13%	51.77%	59.81%	66.51%	72.09%	76.74%	80.62%	83.85%
12	8.33%	15.97%	22.97%	29.39%	35.28%	40.67%	45.61%	50.15%	54.30%	58.11%