I spent 10 years playing on a keyboard with unweighted keys and I'm rather certain it affected my desire to practice. The other large part was that my teacher did not spend much time on theory with me.

Also, when recitals came around it was a big shift to playing on a grand piano with real weighted keys, and that, coupled with the nerves of playing in front of an audience, often led to mistakes.

I think the weighted keys help you feel more physically connected to the instrument with more of your body. Unweighted keys require the same involvement as typing on a computer keyboard.