I prefer wallets that dont know my email or any other information. OWNR wallet, Exodus, etc
Any wallet that doesn't request for mails and password always have backups like private keys and mnemonic seeds, any wallet that ask for mails to sign up wallet accounts are dangerous and you can only recover your fund with email and password
Not at all.Try to look blockchain info which do need some identifier and password but you could at least get up the seed which is important when you try out to import into other wallet.
I just dont suggest to make use of custodial wallets or simply to those wallet service or even exchange wallets that dont give out its users with the wallet keys
There are lots of scamming attempts that do happen into this market and you should be aware and be sensible in any actions you made if you dont like
for your funds to be compromised.