Originally posted by Count of Flande
Godfrey was indeed a great warrior, and commanded the respect of his troops as such, but I think he was a poor administrator and strategist/tactician.
As to administrator: he was over his head in debdt before he left on Crusade, he had to sell his castle and "aqcuire" some money from the local Jews to fund his army.
As to strategist/tactician: whenever important strategical/tactical decision were made there is little mentionning of Godfrey. (whereas when there was some headbashing to be done he was on the first row)
Proof of his tactical incompetence is when he decided to charge the walls of Constantinople and, of course, failed. Only thing pro him here was how he handled the battle of Ascalon with a surprise attack that cought the much bigger Egyptian army completely off guard.
His diplomacy would be hard to rate, he wasn't king long enough. But he did handle the little conflict with the Hungarian King very diplomatically on his way to Constantinople.
@nikolay: I don't really believe in the rumours part (they hadn't been there long enough to be many rumours), but you do have a point: a man accompanied by even a small number of knights would be deemed a man of some significance. (I suppose the Armenians saw some pilgrim knights before and knew these guys were not to be trifled with.)
I think he was heavily in debt because of the mini-war it took to secure his uncle's inheritance against Matilda and her partisans (Margravate of Antwerp, Duchy of Lower Lotharingia, County of Verdun, etc). But yes, every example I can think of demonstrates his personal prowess but not necessarily leadership abilities.
At the Battle of the Elster (1080), he cut the Anti-king Rudolf's sword-hand off, wounding him so severely he died shortly after, which turned Henry IV's tactical defeat into a strategic victory and literally won him Germany at a stroke. He ended Henry's 3-year siege of Rome by personally leading the imperial troops over the walls (1084), and fought with the Emperor in Italy again in 1090-. He was in charge of the fighting in Lotharingia 1076-1089 against the Count of Namur, Bishop of Verdun, and Matilda's other partisans, but I dont know any details except that he eventually won...