Beautiful sequel with improved game mechanics. If you liked Spellforce 1 you will also enjoy this one.
Unfortunately the story is not as good as in Spellforce 1 and they combined the different races into three different alliances, limiting the amount of titans to just three. I can't deny that I missed summoning three titans at once to strengthen my army, but the new titans are well designed and very strong. Seeing that they can turn the tides of a battle gives you sweet satisfaction or despair if it's the enemy ;-)
I like the new hero system. They abandoned the rune system and give you permanent fellows instead, which you can skill to your own liking, at least to some point. A simple base orientation is forced upon them to keep the story consistency. Sadly they cut down the magic spells a little bit and removed all permanent auras.
Something important that I almost forgot; they added mounted and flying units granting you more strategical possibilities, unfortunately they don't have massive dis-/advantages over other unit types, like it is the case in The Lord of the Rings: The Battle for Middle-Earth. Of course there are counterunits, but no real annhilators. (Damn I loved to run down some goblins with my Rohirims, but those phalanx carrier were really scary^^)
For those of you, who got tired of all the walking in Spellforce 1, fear not Spellforce 2 is much better in this matter.
The addon is also worth playing and comes with a fourth playable faction.
In conclusion: You should play this game, I'm certain you will enjoy it, even if you still prefer Spellforce 1, that's what I do.