In particular, the ones used for the last portion of the Aizen arc are basically amazing. Actually, all the Arrancar-arc ops have been pretty good (11 and 12 especially.) But this 13th one is so good. It's the SID effect.
Anyway, I'm pretty close ish to finishing it now...I started watching in 2011 but only got to about episode 120, because Netflix. I tried again last year but only got to 160. Started again a month or two back and have gotten from 160 to 292 (skipping filler ftw). So I have like 30 odd episodes to go, more or less...ish. So it looks like I'll finally be able to put this one in the bag and move on.