My first sequencer was a dedicated hardware one.. A Roland MC 500...
Computer/Software wise:::
Pro 16 on a Commodore (I think..) computer.. then, Pro 24 on an Atari 1040ST.. Thereafter, C-Lab Notator on said Atari... (there was some very 'colourful' sequencer I dabbled with sometime around then that ran on an Amiga computer..can't remember the name..).
Notator was the program that dragged me away to not use Cubase... Logic was next..