Anything before 2003 I don't remember much of, so I am basing my ratings after that storm. In '96, I was stuck in FL for my grandparents' 50th wedding aniversary, so I missed that storm completely... it was hell to get a flight back into DCA from JAX...
Jan 2000 -- All I really remember was listening to my weather radio and hoping beyond hope Bob Ryan was wrong (that we would get grazed by the SLP at best, one inch at most) and hearing my weather radio go off ~10PM and WSWarnings being issued for 4-8 inches for us... then 6-12 later that night and so on. I remember running downstairs to my dad and telling him -- he didn't believe me until he saw the warnings himself
2009-10 season as a whole was the best... I remember being on the computer alot where I work and not getting much done during the December storm and the February storms since I was tracking the storms so much... luckily most of the admin knows I am a "weather nerd" so they let me do some model watching as long as I did some work
If I had to pick one, probably the Feb 5-6 storm first