Hi
I also play acoustic and classical along with my electric.
I have a classical guitar that I bought in Spain and i have been taking lessons for around a year. Passed two exams so far.
I also have a Martin acoustic steel string which I get out of the case now and again for a strum. That's a beautiful guitar.
Picking up an acoustic is very different to an electric - the string tension, spacing, the tone and all these other factors force you to play something new and not rely on your old easy tricks that you know.