Assuming that the other tribes accepted his overlordship, then Gideon might have made a good king. Although he had proven himself in battle and men obviously were willing to follow, effectively leading that fractious bunch known as the Children of Israel would be a task that try the patience of Job. Gideon would be a better king than Saul, who was probably a manic depressive. Samuel made a booboo when he anointed this man. [And for all you skeptics, please refrain from claiming that Gideon, et al. didn't exist. For the moment, let's assume that Judges and Samuel have some historic reality.]