docthe12th wrote...
Shepard is not a general, (s)he's a team leader whose primary talent is Special Forces work. Spectre, commander, and Cerberus asset are all roles suited to that line of expertise. (S)he needs a relatively nimble ship for recon and insertion- based missions rather than, say, the Destiny Ascension. Shepard would more likely be involved in finding a way to disrupt/ incapacitate the Reapers than to face them head on... that's what the turian fleet is for.
Actually, if you are paragon, he is much, much more than a General. In effect, he's his own state, with allies comprised of entire species, with more military might than any government in existence. He is stitching loyalties across the entire galaxy, with really only the council species not swearing some degree of loyalty to him.
Also, I think the Normandy is perfect for him. It is armored better than many dreadnoughts, it has weaponry as powerful as a dreadnought, it has shields strong enough for major conflict, if short ones, and yet it is maneuverable and light enough for ground operations.
It's a versatile flagship, capable of weaving in and out of hot spots and surviving attacks that would have destroyed a lesser vessel.
Plus, with the Geth as an R&D department, it would be able to advance beyond current systems and technologies far faster and more efficiently than any dreadnought built by one of the council species.