The most convenient are the mobile wallets, because you can use them everywhere easily. Of course they are not the most secure and risk free, too.
You should do your own research and decide what is best for you
Exactly different wallets have different features and you should choose according to your convenience I am using multibit at a moment but when I need to convert it to fiat I transfer it to localbitcoins.
Concern the localbitcoin. Is the site tested and trusted cos I don't want to get scam.
Localbitcoins has been around for a while now, I think the only people you need to worry about trusting there are the people your trading bitcoin with.
It is still more of a exchange (yes one without people providing info as it's users want to be anonymous in most cases). But read new's about storing on exchanges there are just to many bad stories and hacks to store on a exchange and believe your safe. Only one that I can think of different is coinbase due to it's insurance policy.
But you really should use a good hot wallet for short term spending. And a good cold wallet or hardware wallet for long term.
Thanks for the advice, must admit I am guilty of keeping most of my bitcoin (epecially alt-currencies) on exhanges.
Probably a habit I should break, it's just a lot more convenient when I'm trading. I keep meaning to learn how to make paper wallets (securely)....
Exchanges make it really easy to do with so many wallets all on one site. They do such a good job many use it to store altcoin's long term. But at end of day it is a hot wallet. Not only that it's a huge target many "bad people" target exchanges knowing about amount stored there.
Glad to hear you and hopefully others switch to a more secure storage vs standard exchange with ton's of alt-coins.