I've played this game before, but we've always separated them into living and dead categories.
Dead
1. Jesus Christ - I'm not a religious person, but how can you not pick him?
2. Abraham Lincoln - You can the argument he was our country's greatest president
3. Albert Einstein - THE scientific mind of our era
Living
1. Mikhail Gorechiev - It would be interesting to talk to him as one of the bigger historical figures of our day, especially so having the "other perspective"
2. Fish - A Scottish progressive rock singer favorite of mine
3. Whoever is Woodward and Bernstein's "Deep Throat"
Ask me the same question tomorrow, and I'll probably give a totally different list.