I may be being biased (
I love food) so I would fancy Good Food on DTT. Or when Sky Sports and ESPN are removed from DTT, maybe Gold and Home could use their hours and expand their current broadcasting hours. About time Freeview had a specialist home and gardening channel or a comedy channel. I like Only Fools and all the old BBC comedies. Here are some links you may be interested in:
http://en.wikipedia.org/wiki/Gold_(TV_channel)
http://en.wikipedia.org/wiki/Home_(TV_channel)
http://en.wikipedia.org/wiki/Good_Food
Also, if Top Up TV close down soon (which I think they will), then there will be more space on the multiplexes for Freeview to expand their channel offering.