Well, there still is going to be the trade deficit to address, and nobody is quite sure how subprime is going to unwind, so I wouldn't put too much store by his economic numbers. It has been speculated that without the deficit reduction policy and the tacit support Beijing has given him, we'd already be in a financial crisis. Of course, that speaks well of his diplomatic skills, or maybe those of Colin Powell (he's said to have problems controlling his temper personally, for all his foreign policy smarts).
Afghanistan, I think, was unavoidable, and I'm not sure you could call Sudan or Zimbabwe wars, really. Khartoum has the Chinese sitting on things while AU forces are in control of Darfur (well, nominal control, but they do most of the legwork, the Americans are just there for training and logistics). Zimbabwe is all but run by the MDC militias. Not that I disagree with either move (and don't get me started on Jesse Jackson's opinions...), but war looks different.
Venezuela... well, people say it was a genuine instance of temper. Almost Rooseveltian. Teddyish, I mean. Nothing big came of it, fortunately, but it damaged a lot of diplomatic goodwill in Latin America. I wonder, what happens the next time a leftist is elected?
Incidentally, put no store by the rhetoric from Berlin, the Germans are quite worried about Clinton. McCain's style grated, but his substance was highly respected by and large.
I don't think 5th on the list of greats is anything but regret that he must go. His approval ratings were good, and everyone felt that he got the USA safely through choppy waters. I think of him like Truman, a competent man to take the US through a paradigm shift in foreign policy. He will go down in history as the first genuine post-Cold-War president, the one who understood the realities of emerging multipolarity and moved Washington into a new global alliance system. Incidentally, I don't think he liked it one bit - remember his 'no black and white' speech about China and Africa? He sounded very different on the campaign trail.