Yeah doors/small and uncomfortable. I wish I could drive people (makes more) but at the same time I got my car for me. It's not a fancy car I wish, once I'm not in debt/have more money I want to graduate to cooler cars like a Lotus Exige.
As an aside, delivery can be fun as far as exploring a city and meeting random people (mostly the food workers) but it's a way to get out. I am destroying my car though putting like 1000 miles a week on it or more.
I think once I'm out of debt I won't drive/donate plasma anymore and just use my spare time for other things provided a have a good paying job like I do now.