Extras was a weird beast - sometimes made me laugh a lot, but mostly I didn't really understand what was going on at all. I'm not a massive fan of shows that 'deconstruct your preconceived notions about what celebrities are like in real life', as usually I don't really care what they're like in real life. If I did, I'd read magazines about celebrities, and watch chat shows, and then kill myself. And people like Ben Stiller play up to this concept so knowingly, the whole thing gets very murky very fast.
The stuff that worked for me was the relationship between the fictional characters (and Stephen Merchant was great, so I was pleased to hear he'll be in it a lot more in the second series).
Anyway, on a slighly different topic, with that episode of Extras that had Patrick Stewart in it that was repeated recently, when it first went out, didn't some reviewer chuckle along to the 'low budget identikit fantasy movie' that opened the episode? And wasn't it in fact, er... The Tempest? Or did I completely imagine that?