Bill gates shares his thoughts about Microsoft in overall with Gizmodo. This long video is put on youtube so everyone can see. Remeber, it's looong. :D
Quotes from the interview

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Interviewer : What one product do you wish you could have polished more?
Bill : Ask me after we ship the next version of Windows. Then I'll be more open about it.

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Bill : By 1995, maybe like 87 to 95, Microsoft had this honeymoon period. Like Google has now. Where almost everything we did, people thought it was just amazing.

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Bill : I still believe in the tablet that we haven't made mainstream. Rumour says Apple is doing something in that space.

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Bill : With XBOX Live which was immensly risky ... but XBOX arose this fantastic success ... a huge asset to the company.