Thanks for the replies.
For a good share of my life, I've been an acoustic guitar player. I started playing keys only a few years ago....well into my senior years.
But even I(besides my students)can enjoy the difference of playing a weighted keyboard vs. an organ touch...and I don't know what I'm doing.

Weighted keys make me(and apparently my students as well)feel like we're much more in control.
it depends on what you play... For playing piano and most other dynamic instruments i prefer a weighted action, but playing fast organ and synth action on a weighted piano action is not advisable, so thats where a 2nd keybed comes in with synth/organ action..
Som lighter 88 key actions like on the Kurzweil forte or the Nord Stage, Yamaha Motif and Korg Kronos are a trade off between the heavier piano actions and the lighter synth actions. kurzweil ans Nord are weighted actions.. While kronos and motif are still hammer actions but not weighted.