Episodes 1-4 of Big O
Nothing particularly enthralling, but it's good at what it does, the battles are pacy, the music is noir-esque and the designs have a pleasing 50's-era sci-fi vibe to them. It's unlikely that I'll be picking this up but I'll continue renting it.
Episodes 18-21 of Bakuman 2
Ah, things are finally getting good again (well, better, it's always been good, but recently it's been "just" good, instead of great). Man, Iwase is a conceited bitch... her motivations are so self-centered and arrogant, but if nothing else it's spurred Ashirogi Muto on. Episode 20 really kicked things into shape again and I'm looking forward to seeing how this series will end (though I wonder how much longer the series will last...)