The Story (9/10) is absolutely great - fantastic, really. The first 7 episodes aside, the over-the-top style gets progressively MORE over-the-top over time, a difficult (or near impossible) thing to get away with without near-perfect pacing thereof, which Gurren Lagann delivers flawlessly.
The Art (8/10) is nothing all that special, though it does have its own unique style, just like the rest of the show. Personally, I wasn't all that impressed by it, but I found nothing wrong with it either.
The Sound (10/10) is brilliant. The voice acting in both the original Japanese and the English dub are fantastic. The soundtrack is an absolute gem - no other series could pull off opera fused with rap, but there it is near the end of Gurren Lagann; the soundtrack was so good I was left grinning from ear to ear like an idiot in the middle of several episodes near the end. The music may seem repetitive at first, as the same thematic material is used throughout the entire 27 episodes, but the impact of these themes, as with most of the show, gets better and better as you approach the end.
As for Enjoyment (11/10), I cannot begin to describe (or understand why, for that matter) how enjoyable Gurren Lagann is. It draws you in like a cult and builds itself up in the eyes of the watcher exponentially.
To be perfectly frank (and cheesy) this anime is about feeling - by the time you get to episode 20, you feel the NEED to keep watching - what originally seemed over-the-top (and still is, in hindsight) is absolutely enrapturing. Say what you will, but this anime is easily one the most entertaining ever aired. Be warned, you may hate the first few episodes; I myself had a hard time getting through the first 8 episodes. From there on, however, it really does get good quickly. The story of the man whose drill will pierce the heavens is a great one - don't miss out.
