I like Sheridan well enough, but he doesn't seem enough like a military commander. He's far too ornery (like refusing to pay rent on his quarters when he can well afford it), way
to friendly to the Minbari for someone who fought in the Earth-Minbari War, rather more lefty than you'd expect from a military man (how many would have picked the solution he chose to the strike in By Any Means Necessary?), and very quick to distrust and go against the government. Not that any of those are bad things, but they don't seem like a recipe for a commander who would be chosen to head B5 specifically
because the higher-ups thought he'd be obedient.
But then, the Minbari thing bugs me generally. They - and Delenn in particular - are basically treated as the moral centre of the show, despite the fact that they committed genocide
against humanity during the Earth-Minbari War and were ready to completely wipe them out despite repeated offers of surrender from the Earth government.