Between flips we keep a shitload of cash in our regular bank account. OMG, they were driving us crazy wanting to pressure us into "investing" with them. We finally had the manager put a "Do not bother about investments" note on our account. The calls mostly stopped. When I get the occasional call from a newbie, I just tell them to call the manager of our branch, which stops them cold.
Last week we bought an RV. We went to the bank for a cashier's check. It was kinda fun, knowing that even though the new-to-us rig was quite expensive, it didn't make a huge dent in our balance. We got the cashier's check with no fees and zero hassle, which was nice. In fact, the manager came over and chatted with us about the motorcycle her husband just bought, while the cashier finished creating the check. DH advised her to buy cheap term life insurance asap. Love that guy!
What I notice is more confidence on my part. When you have plenty of money, it's amazing how many "problems" simply aren't any more. It gives me a surprising feeling of buoyancy, and I like it.