I'm with Dunstone
I don't want my ISP to bombard me with adverts and offers for music & film (which, as soon as they start providing them, you know they will. You won't be able to move for annoying adverts plastered over your bills, promotional e-mails, ISP home pages...).
And you can guarantee that they will repackage their tariffs on the assumption that everyone MUST want this "content", in the same manner that it's pretty much impossible to get a contract phone without bundled minutes and texts (a number of older people - and parents to give to kids - want a mobile phone for the security aspect, but don't want to be paying £20 a month which includes "content" in the form of calls and texts that they just don't use. PAYG phones have "expiry of credit" which confuses some, and they would prefer a low monthly bill paid by DD to know that it's always available should they need it).
I want my ISP to just give me a pipe to t'interwebs, not to try and be a "content provider". When I want "content", I'll go get it from the place that gives me the best overall deal based on price, convenience & format.
I would also like ISPs to be able to get right what they're (supposed to be) doing at the moment before they start trying to "monetize" us all some more.
Go go Charlie D!
(as an aside, I don't d/l naughty music & films etc. Once upon a time I would buy 3-4 CDs and a couple of films & games per month. Now I don't spend anything like that. Reason being that there is just not much content out there that I want *and* am willing to pay the asking price for.)