Frogs legs are nice, but a lot of bone and not much meat.
Caviar is fab and gorgeous ... although I only buy the lumpfish stuff from Waitrose, coz I'm a tight arse (except occasionally with the BF).
I don't like soft roe very much.
I would also struggle with casu marzu. I looked on YouTube to see if there were any clips of anyone actually savouring it as a delicacy (it is meant to be!) ... but could only find a family eating it as a challenge, and obviously hating it, and Gordon Ramsay eating one bit, to say he'd done it. There is no evidence of anyone, anywhere, actually enjoying it.