Well I never had a PS1 so that is out for me. Man it's hard to chose between the PS2 and PS3. The PS2 had a crap ton of great games. But I am going out on a limb here and saying that overall I like the PS3 the best. Playing Uncharted 2 this week has made me pick the PS3.
End of 2009 sales predictions:
PS3 - 33 Million 360 - 40 Million Wii - 75 Million