Why can I only see the balance of my wallet and not the one of each of my receiving addresses? (Multibit)
There are multiple reasons why you do not see individual address balances or get to choose the sender address:


For privacy reasons your client will generate a new address for every change output in your transactions. Soon, you'd have many more addresses; and choosing from a long list of addresses is not user-friendly.
"Addresses are not wallets nor accounts, and do not carry balances. They only receive funds, and you do not send "from" an address at any time." (see Address Misconceptions)
There is no "from" address (see From address)