I played with an IBM mainframe when I was in university (mostly for the free t-shirt), and the reason I don't really want to work on mainframes for a living is

I played with an IBM mainframe when I was in university (mostly for the free t-shirt), and the reason I don't really want to work on mainframes for a living is because too much of what I was doing revolved around the machine, as opposed to problems. For example, one problem revolved around creating a file, which required me to specify how many lines and how many columns it was before I could open it. I suppose this is why I prefer higher level languages e.g. Python, as I can spend more time thinking about the problem at hand than, say, the details of HTTP.