Thanks to Iain and Paul for reminding me of the various articles going around saying that 1812 was one of the worst years in history.
Mind you, I am sure the years 1933-1945 cause stiff competition. In my own lifetime, definetly 2001, simply because of 9/11.
As for me personally, I think one of my best and worst years was 2004. That year I was working for an MP on a short-term basis, I got to know Kerron Cross (one of the most thoughtful and helpful friends I have in the Labour Party), I attended that year's Labour Party Conference as a delegate, I was in my first relationship for five years (even if it was short-term), and (slightly more battle-hardened), I fought my second election campaign for Councillor of the Baldock Town Ward.
On the minus side, I lost a close friend in a freak accident on the London Underground, I got made redundant along with about half a dozen others in my job at a local coffee shop due to a company takeover, and of course the aforementioned relationship ended.
And the best year overall? Well I think that's yet to come, as for the worst, well I think that was 1993 (I had short-term depression), 2000 (was unemployed), and 2004 (for the reasons given)