(Don't have the s2 DVDs at home right now, so everything said here is from memory...)

A question I've been asking myself is: how would Centauri emperors be 'elected' (not sure if that's the right word, but you get my meaning)? Turhan, if I remember correctly, succeeded his father, but had no heirs himself; neither had Cartagia (or, at least, none he admitted *g*) and Londo. So in that case, is it always the Ministers who choose a new emperor - or claim the throne for themselves, by assassinating their rivals? Nothing democratic about it at all?

I also found Vir's involvement questionable as well; he grows during the series, and deals with his guilt. But he is guilty. There may well have been nothing he could do; but nothing is exactly what he chose to do.

You know, I've never looked at it like that, but you have a very good point there. Of course, knowing that Vir's main motivation for being silent is his loyalty to Londo, it's quite easy to forgive him (which is, I guess, why I've never thought about him as guilty in the first place). But yes: at that moment in time, G'Kar's later accusation in Londo's heart-attack-induced dream ("It doesn't matter if they'd listened! You had an obligation to speak out!") applies to Vir as well.
Of course, he makes up for it later, first in a small way by apologizing to G'Kar, then by freeing 5000 Narns from a work camp. Interestingly, this is the exact opposite order in which Londo makes repairs later: he first frees Narn, and doesn't apologize until much later.

Sinclair is a nut.

Whoa. This is Valen we're talking about, dude! Shouldn't we show a little more respect? *g*
But seriously: yeah, he is, if you think about it. Bonkers, totally.