I also didn't like My Dad Wrote a Porno, it wasn't that I was offended, I just didn't get what the joke was supposed to be, it was just weird. But I'm not short of stuff to listen to, so not fretting over it.
Some of the other things I like:
How to invent a country
The Boring Talks - some are indeed boring, but many are strangely fascinating. I especially like the one about pallets. Seriously, those wooden things used to hold piles of stuff while it is transported around, have quite a back story. Who knew there was such a thing as the European Pallet Pool?
Mortem, about solving murders using the evidence revealed during the post mortem.
There's been some good ones under the title Intrigue, from the BBC.
Giles Coren has no idea, the Scummy Mummies, Fortunately with Fi and Jane, and Jenny Eclair's Older and Wider I also like, but these are all of the 'two mates chatting' variety, which I didn't realise so many people didn't like.