There are no good sides. Soon as Ukrainians realize this, the better. You can't just choose a side and that seems what is happening. Putin's puppet Yanukovych was like either leader (whether on the EU side or Putin side).
It is laughable the amount of sugarcoating from those pro-Putin on this site. The anti-American/anti-EU rhetoric is find and dandy but then so many are defending the Putin positions. Yet, this is what Putin supported:
Awsome video of former Ukrainian president Yanukovych empty luxury estate. - YouTube
This is what the 'legitimate' leader in Ukraine was doing. I wonder why poverty-stricken Ukrainians wanted to change the system so badly. Oooh, what reasons could there be?!? It's just that the Western Elites recognized this opportunity to manipulate things but Putin's murder of Ukrainians is as bad. But, no one talks about that here. He is supporting military in Ukraine trying to overpower authorities to split the country so that is better than Western influence, I guess.
This issue or conflict is very complex and it doesn't have 'good vs bad' sides. Period.