Teenage Engineering OP-Z
The OP-Z holds a special place in my heart.
It’s a very portable synthesizer and a delightful sequencer. The synth part is maybe a bit finicky and obviously limited, but the sequencer is incredibly strong.
My main use for it is a sketchpad for ideas. It’s just so easy to come up with an idea, put it onto the OP-Z and refine it later (on something like the digitone).