Well I've finally made my decision on the civil war, though I'm not committed to it, I'll likely go with the Imperials and I have a number of reasons why thanks to some research in to the lore I've looked at both sides to establish who has the best cause. I won't go in to much detail (unless asked) but though both sides are flawed my main motivation is to make a decision which would least benefit the Thalmor who are the real enemy of Tamriel and want the civil war to continue and weaken both sides for their benefit. The Imperials may not be the best choice for the region of Skyrim, though I have my reasons once again, but the Stormcloaks under Ulfric are self interested and will not soon be banging on the Thalmors door in their own lands.
It's sort of like choosing between a rebel native tribe and a large empire like the Romans, the tribe promotes racism and seclusion with otherwise good intentions whilst the Empire makes it's own mistakes and is to a noticeable degree a fascist faction but is also a more sophisticated and organised faction which can recover from it's corruption given the opportunity (a Dragonborn hero would be just the sort to lead them in the right direction both against the Thalmor and internal).