[bladeofdarkness]

actually
no its not a matter of opinion
on the one side you have britannia, an empire that conquered about a 3rd of the world and continued to conquer and enslave more people all the time
and on the other side of the board you have the japanese people who have been conquered and oppressed by britannia

one side is the right one, the other is the wrong one

your mistake is that you confuse suzaku's path with that of britannia
in other words, "honorary britannians" vs "japanese"
when the actual conflict is "japan vs britannia"

suzaku, was part of those japanese who believed that if they lower their heads and behave themselves, they would be treated less horribly then if they would rebel
people who had resigned themselves to a life where they MIGHT, if they are lucky, be treated as second class human beings
and that MAYBE, in time, things would get better for them AS second class humans
this is not a result of "wanting to be part of britannia"
this is a result of giving up any hope they may have had for anything more
which is not the same

lelouch was fighting for on the side of the oppressed against their oppressors
suzaku, fought on the side of the oppressors, out of the belief that fighting back against the oppressors was hopeless
you cant claim that suzaku fought "for britannia" any more then you can claim that lelouch fought "for the japanese people"
but those were the sides they fought on

at least in season 1 that is
season 2 is a different matter