The best aRPG I have ever played! Yes you heard that right. Better than diablo and i played that for endless hour
First off, the graphics are way ahead of its time. Really impressive and accurate graphics of the character and the environment draws you in the very first second. Even though the gameplay can be a little repetitive at times, its uniqueness absorbs you in no time again from the start.
Secondly, whats bad about cloning a game and a style. I for once would not own a pc if it was not to play hack n slash rpg games. Diablo does not hold copyright of the style. Would you be able to only play diablo (an ancient game) again and again? Well I am not.
Titan quests does not only have way better graphics but it is brighter, more relaxing and more fun too, combining elements of history and mythology in a very unique way.
My humble opinion: The very best game of its kind till today as of June 2012. No doubt there will be some awesome and better game in the near future ( as technology progresses) but just as diablo hold for me the title for nine years, this way Titan Quest will old onto the title for a little while longer.
Conclusion: Play the game. It worth every single penny.