I get fed up with this constant 'choice', but at the same time I am conscious that it does save me a lot of money.
We need specialist insurance for our house because it is listed. We were with a broker for nearly 20 years who moved us between specialist companies to get us the best rate, but we thought it was getting expensive so hunted around ourselves and saved our selves several hundreds of £s, by going to an organisation that didn't work through brokers.
We have changed energy supplier several times and each time it has been a hassle, now we look at the comparison sites, and as long as the company we are currently with is competitive, we stick with it but each year, re-choose the cheapest tariff for us so that we do not get moved onto the Standard variable rate.
As far as I can see there is very little reason to change banks unless you get bad service or there is other pressing need.