Funny thing is, Nanoha is NOT the most powerful person in the show. All told, that'd be Reinforce Eins, who died after three episodes. Then it's Hayate, who spends her first season as a wheelchair-bound sick girl, then barely gets to show her stuff in Season 3. That's another thing about Nanoha--it shows some consequences of the magical-girling;
For example, Hayate's power is on the level of a nuclear warhead. As such, the brass never allow her to use her power in the same situations as our heroes do, since that'd be like using a tactical warhead on a fly. She only gets to use magic on a large scale a) out to sea, on a bunch of drones, and b) when a giant warship and robot army are taking over the city.
In addition, it shows what might ACTUALLY happen if a character went with the training-from-hell routine. Nanoha gets stronger, yeah, but in the longterm it ends up with her getting almost killed because she worked so unreasonably hard.
A third thing: By the second season, most of the conventional magical girl tropes are gone. Our heroes now have magical weapons which use cartridges, serve under a government agency (headed by the local Reasonable Authority Figure) and every villain has a REASON for what they're doing. There are no monster-of-the-weeks, and a significant portion of time is spent developing the 'villains' and their motivations. It gets to the point where you honestly don't want anyone to lose, and wish that the circumstances would let them sit down and talk things out.
Well, let's jump on the bandwagon, shall we? For some reason, I can't stand usual Magical Girl anime -- Sailor Moon causes me either to face-palm or laugh uproariously, depending on my mood, and I... more
The first two seasons have been dubbed, so the DVDs should be avaible somewhere. (Although I would recommend subs, as the dub isn't that good) The only way to watch the third series is subs, as it... more