I generally like the idea of setting ENS records that show your preferences. 1 way that may be possible to do this is to add each NFT to a record, and then using one record to put it all together. e.g:
"1.nft": "<NFT Contract Address A>:<TokenID A1>"
"2.nft": "<NFT Contract Address A>:<TokenID A2>"
"3.nft": "<NFT Contract Address B>:<TokenID B1>"
And then you could do things like textRecords['top nfts'] = "2,1,3"
And then use the same references for another type of list: textRecords['avatar'] = "1,2,3"
The above design would make it likely more expensive to create the NFT references, but cheaper to update different lists of NFTs. On standardisation, I think this could definitely be some kind of ENSIP if we were going to do it