Watched all four Bionicle movies again to see how they hold up after all these years. My perspective has definitely changed a lot.
Mask of Light: I actually found this one to be terrible. The Toa were portrayed as incompetent, Kopaka excepted (though his competence was far exaggerated), Onua was completely mischaracterized, and the negative aspects of Tahu were exemplified three times over, with the positive aspects basically nonexistent. Pohatu was basically a handcuffing machine, though thankfully his personality was done right. The Rahkshi designs were atrocious. Jaller and Takua's voices were horrible. Takutanuva's design was also an abomination.
I liked the 2003 story, but the movie's portrayal of it was a total scrapfest. Ironically, this used to be my second favorite of the bunch.
Legends of Metru Nui: Once my favorite, this movie has fallen to second place after this viewing. The story was, of course, excellent, but the fact that the Toa were portrayed without their elemental powers until the very end bugged me. That confusing scene with Makuta talking to himself also took a few points off. Krekka, Nivawk, and the Vahki were dreadfully designed, with Krekka as the biggest offender. The climactic battle with Makuta and the storyline weight in this movie raise it up, in my opinion, from meh to good.
Web of Shadows: This one used to be my least favorite...and now is my most favorite. Character designs were done fairly well all around, something I can't say for the first two. Whenua's cheesy line, naturally, was a bit strange, but it wasn't bad in and of itself. It's just the way he delivered it that was horrible. This movie did finally nail the proper tone in most areas though. It had the right degree of seriousness. Matau's lines were also great. Vakama's defection was definitely forced, but it was still believable, all things considered. The voice acting, Whenua excepted, was also good in this one. The new music they added was a pleasure to listen to, especially mixed with LoMN's already excellent musical themes.
The sheer amount of points I give it for tone raised it up pretty high.
The Legend Reborn: Well, I can say one thing for sure: designs are spot on perfect. Animation and design are where this movie really scores. Voice acting was hit and miss, but generally believable as long as the one in question isn't one of the Agori from the crowds. The movie was interesting at some parts and bland at others. The final battle was a total mess, with Tuma being far too stupid. The Skrall, even more so. At no point in the movie was it believable that they had a record of winning arena matches. Worse still, they never had any lines other than high pitched squeals and grunts more suited for Zesk or Vorox. Even if they had never spoken words, it would have been fine with me if they had low pitched roars and grunts, and at least beat out the Glatorian/Toa in physical strength. They could still have shown them winning the battle as they did with their elemental powers. Also, the delivery of their line, "For Unity" was worse than Whenua's "Cause that's what friends do!"
Still managed to top Mask of Light's atrocities for me though. So I give it third place.