I'm currently rewatching Bokurano... I first watched it back in 2008 or so... was pretty impressed by it. Rewatching it now, the severe drop in animation quality makes me cringe so hard, it gets hard for me to focus on what's actually happening within the episode.
And speaking of drop in quality; I didn't mind so much back then, but right now, I'm really disappointed that the anime took too many liberties with the story. Honestly, the way the manga was written and presented was just perfect. The complexities and dynamics between each character was just superb. However, I'm also a huge fan of Mohiro Kitoh, so maybe it's no wonder that I prefer his version of the story over anything else.
It's still pretty cool to see Zearth move around, though. I kinda hope they will consider rebooting the series and strictly follow Kitoh-sensei's direction. For Naru Taru, too.