In Europe we have IBAN numbers for EUR account and it is not rememberable at all by avg. person same as bitcoin address you just copy paste it and check visually it is the same (to check for clipboard modifying viruses. Replacing long bitcoin address with shorter one which is still non memorable is useless.

If you want to make something like paypal with sending to email you should think about blockchain solution in which you could voluntarily publish email address xzy@xyz.com belongs to bitcoin address ABC. Sort of named bitcoin address.