Electrum because it's open source and been really fast for me. Because it isn't really a web client like a blockchain.info or something else wallet in my mind it's much more secure. Also, the "brain wallet" concept of electrum is super neat.
I would put Electrum and blockchain.info into the same security category as with both your private keys should be private. I like the seed thing with electrum, too.
Depends.. for a regular user I point them towards blockchain.info with a the appropriate disclaimers, but if it's a business owner I point them towards Qt + armory, maybe Electrum or WalletBit again with the appropriate disclaimers.
What disclaimers would you give for blockchain.info?
I am looking for a simple to use solution (edited the op).
Does WalletBit know your private keys?
Hmm, too complicated for a noob I'd say (edited op)
Not sure if an advantage versus the regular installer for the average user... ?
For a zero day user I would say blockchain.info. Bitcoin can be overwhelming as it is. Blockchain.info plus something like BitInstant can allow a complete (as in "what is bitcoin) noob get up and running quickly. Now the standard disclaimers apply, "trust nobody", use 2FA, make a backup of your blockchain.info wallet, and keep the volume low. Still for someone looking to buy say 20 BTC tomorrow I don't see a reason to get more complicated. 20,000 BTC? Ok well there is no fast and easy for that.
these are good tips for sure. 2FA makes things more complicated, though, and also gives away your identity (as far as I see).
> keep the volume low
that does not sound too good
Without a doubt blockchain.info is the most user-friendly client for new users.
I no longer tip in dollars at restaurants any more. I have the server set up a blockchain.info wallet on their phone and send them their tip that way. It's incredibly easy for them to get started, so I can spend more time showing them places to spend, sell, gamble with, or get more bitcoins.
Strong arguments towards blockchain.info. Best for starters I guess but leaves me a little worried about centralization (Electrum, too btw).