I'm not sure. Personally, every time I start a new record, I try to completely do something I've never done before. I don't see the point in repeating myself. If I feel like something I've done resembles something else, I erase it. That's just me though.
I think most artists tend to get "worse" as they go along, or at least more tired. There's a few exceptons, but.. think of it like this. The first record a band comes out with, it's kinda like.. their whole life has led up to this. Know what I mean? I just can only think of a few bands where they tend to get more interesting as time goes on -- usually, their first records are the ones with the energy, the passion, the creativity, etc. I mean, this goes for popular bands and underground bands. Oh, bands might get "Better" -- as in more "Talented", or something. For a lack of a better example, look at SYSTEM OF A DOWN. They suck completely, but their self-titled album is AMAZING. They added more instruments later, had more complex and "talented" songs, but their energy, creativity, etc. was zapped.
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