As a collector, I'm not actually looking to sell anything. I would have to set insanely high reserves for auction. I'd be more likely to accept offers at reasonable prices from other collectors who seem like they'd be good stewards of the work, not just trying to flip for profit.
You prefer an automated expiry system to a manual one? Is the advantage just that it puts some time pressure on the owner to take the deal? You could always renew your offer though. Agree it'd be good to keep a record of offers.
Buy Now is an option ignored in the poll. it should be interesting to see in a new poll how it compares to Receive Offers, since secondary collectors often do not want to sit their Eth in a smart contract waiting for a response if they really want the NFT