I like Enclave not just because of their aesthetic but also because they seemed like they had the best chance of restoring america if they weren't so genocidal. Colonel Autumn didn't seem to bad though i wish i could have joined him in FO3.
An enclave mod called Fallout: America Rising is good mod if your looking for a new faction to play as. it's not 100% finished but its good as it is, it has its own voice acting for characters too.