Dealing with the staff is often the worst part of the rental car experience for me.

I book online, declined insurance, chose the car I wanted, I don't need your upsell and you telling me that I really should have insurance, which is a bunch of BS as I already have a ton.

As some have already mentioned the shuttle bus is a slight annoyance, you calling them 'sweaty shuttle buses' is leading the conversation. I've never been on a shuttle bus that I felt was sweaty.

I've always thought a curb-side service would be amazing, but haven't figured out how to make that work.

The fuel pricing hasn't been a massive issue, with the exception that again, the rental car companies try to up sell you on their hair-brained and over-priced 'pre-purchase' options.