4) Sonic the Hedgehog. I really enjoy the classic games in the series, I don't mind some of the newer ones either. But I think 3 will always have a special place in my heart as I spent hours on the computer playing it as a kid.

5) Tekken. I don't know if I like Tekken or the KOF games more at this point, but I have extremely fond memories of Tekken 5 as it's probably in my top 3 most played fighting games of all time. I remember coming home from middle school and playing literally all night with my friend once!