For me, I think the banks sucks because they tend to control everything, period!
The bitcoin is fast, secure, decentralized, gives total control and freedom to the people.
Perhaps, you had better experience with traditional banking system way better than bitcoins.

Share with us what you think? thanks

I have mixed reactions to both based on my experiences but I do believe in the potential of Bitcoin.
Banks, especially the big corporate banks, are all about making money at the expense of the average person. They get legislation changed in their favor and get benefits like low rates for them to borrow from the government and government bailouts because they are "too big to fail." They also gave bad mortgages to customers and then foreclosed. Plus they charge high rates for credit cards.
Bitcoin is not a business and therefore doesn't get a profit. It is not directly tied to any government which is a big positive. There are two things that I don't like about Bitcoin though. One is that I lost money on Cryptsy when they failed and there is no way to go put Paul Vernon in jail because no government authorities will go after them. The other thing is the fees could get high and there is nothing we can do to limit that because we need the miners.