I've been playing since 10.. Gone thru a TON of instruments. My favorite kbd of all time is Genos, 2nd was my ARP2600 synthesizer from 70's.. But Tyros and now Genos let me create full productions with just this one kbd. (I do use other kbds).
The beauty to me is it very quickly lets you see how a new song will work/or not.. Very easy to substitute cords, chord extensions. In the old days. You had to record 5 or more parts to get a sense if you were going to have a great, mediocre , or lame song. Genos lets you very quickly refine the song, chords, structure etc.
And yes, because it is such an immediately gratifying instrument. It's hard to walk away from