Something I've been pondering of late.
There are some songs that didn't really appeal to me when I heard them on the albums, but hearing them live opened up a whole new dimension and changed the way I respond to the album version, too.
For me, the biggest change was the first time I heard them play High. When I'd heard it previously, it seemed kind of boring (which I cannot even believe I'm saying, now!), but when they played it at the 30th Anniversary Gig in London I was transfixed, and have loved that song ever since.
Another one, for me, was Drummy B. Didn't think that much of it til I heard it live, and it's grabbed me by the heartstrings ever since.
Also, there's the opposite - songs that are amazing on the album but just don't have the same impact when played live. With a band like NMA, I can't think of any, but I have experienced it with other favourite artists.
Interested to see what people think!