Many Spoilers be aware

As the series went on I could only but be disappointed from what was a very good start. I would say that for the first 2/3rd of the series it really deserve a good 8/10, for its originality, the efforts made in creating different heroes and a real nasty and evil Villain. Then it turns into a family affair where every character is in relation of some sort with the other, with vague mention of a secret society that is not even fully exploited nor explained. Also there are more and more inconsistencies in the power of Peter Petrelli (replicating other's power) which is automatic when needed by the script (regeneration, be invisible, becoming radioactive etc..) and inoperative when really useful (replicating Sylar's powers at first, second or even third encounter, time travel from Hiro and so on) and not to mention that he never uses the ones he really need when he needs them (unlike Sylar), why did it take him the last episode to listen to anyone's mind (aside from the accidental encounter with Parkman), and why does he need his brother to fly him and play the firework while he can fly all by himself (his first ever duplicated power).

So as you can see I'm really upset that a very good start turned into such an anti-climax. The cheap fight against Sylar, and the first few images of the teaser of the second season don't reassure me with the potential disappearance of Sylar's body in the sewage (how the Hell could anyone let him move even an inch) or Hiro in Medieval Cliché type Japan....

Watch it when you really don't have anything better to do and watch Battlestar Galactica instead if you look for the best TV series ever (who said I'm subjective)