I loved the first overlord and i love this one, it fixes many of the problems i had with the first game...with the exception of 2.
1) the camara can still be irritating, the PC version does not have as much of this problem
2) the boss "battles" are boring, this was deffinately the wrong direction to take the bosses. The first game you had to have good timing and tatics to get out of a boss battle without losing a bunch of minions. In this game, its like ok puzzle, move here, move there, attack...its just boring. I loved the sense the first game gave, a hero and the overlord going toe to toe in an epic battle. now its just like, ok you die now.
the new town system: i like, i always felt that taking over towns in the first game reaped no rewards
The new mistriss system: i like, what?
The tower: personally the decorations dont seem as creative as last game but it is still a cool tower none the less
The mounts: i like roling balls of fire
The story: the concept was good but since boss battles never felt epic the story suffered from that
I think this game is just as good as the original, mostly because the lack of a good boss fight really destorys the mood. And the legion soldiers start to get irritating.