In response to the poll: my favourite used to be Blockchair, but they're terrible now. Check
this address: I have a big monitor, but I can't see transactions. I have to scroll down 2 full pages (AI, AML, sanctions and anything else they earn from) before I see the first transactions. And after scrolling, I see TXIDs but that doesn't tell me anything without clicking them. To see all transactions, I have to check 53 different pages and click 10 transactions on each page.
The same transaction on mempool.space is better, although I still have to scroll down 1 page. But at least it instantly shows what's going on with the transactions, and I can just keep scrolling down. If I'd want to check all transactions, I wouldn't want to open almost 600 pages like on Blockchair.