Richard Pzena (Trades, Portfolio) thinks that the three best big banks to own are Bank of America, Citigroup and JP Morgan. He thinks for all of these companies the upside far outweighs the downside risks.
Pzena cites low interest rates as being a depressing impact on deposit gathering institutions earnings. If interest rates rise to a more normal level, spreads are going to increase and profits rise.
Pzena also discusses in the video below what is wrong with Staples and why the company hasn't been able to grow earnings.