My most used power supply is a switcher based 1.2-30V that I built myself out of a cheap module and a surplus power brick, it's convenient because it's a tidy little enclosure that I can carry around wherever I need it. Next is an old Heathkit linear triple bench supply, it's a bit lacking in terms of features, it doesn't have current limiting but the variable outputs are only good for 500mA so this isn't much problem in practice. I like it because it has real analog knobs that respond instantly. I also have a big Tektronix bench PSU which is linear with digital controls, it's very capable but the user interface is pretty terrible, it's the only power supply I've ever had to read the manual to figure out how to use it. There are too many cases where the same button does multiple things. The linear supplies I have are much cleaner than the switcher, but at least 90% of the time it doesn't matter for what I'm doing.