which is better Bitcoin qt or blockchain.info for wallets? im asking because i recently had a problem with QT where i was getting an error loading block chain. it has been resolved thanks to a few amazing people on here. But i still beg the question?
Blockchain.info/wallet is much more convenient, and has a mobile app. There is an attack vector that if the site is compromised and you use the site, the attacker has your encrypted wallet and your password.
Even Bitcoin-Qt isn't ideal for some purposes -- like storing large amounts in an offline / cold-storage wallet. (Use Armory for that.)
Others might think Multibit is the best option as it requires no full blockchain download but is not reliant on any server.