People can advise newbies on what wallet to use but I can't stress enough that so many bitcoin thefts & lost coins are as a result of user error.
Seriously guys do as much research as you can, leave nothing to chance.
We are talking about your money here, leave nothing to chance, take no risks.
I use a mixture of Bitcoin QT, paper wallets and blockchain.info (for smaller amounts).
Make sure you do regular full computer, anti virus scans if you keep coins in an online wallet & if you are doing paper wallets please god create them in offline mode with encrypted passwords.
Use 2 factor authentification where possible & create complex passwords that you use nowhere else.
Sometimes you can get hacked & it's not your fault but I see so many people falling for dumb phishing sites & getting scammed.
Protect your bitcoins like you would your fiat in your leather wallet in every day life.
Defend them with your life