When i started out extracting, i also made acetate from limo. Me too i liked the taste
I think the people who had harsher taste than with freebase, didn't evaporate the acetic acid completely enough.
I can say it works well for changa, too. You can dissolve it in acetone or alcohols, no problem.
The reason why smoking salt forms is discouraged, is that it's unclear what happens to the acid ions when you burn them. There was a thread stating that the pyrolysis products of fumarate can cause long term harm to the lungs even in small doses.
All in all, i decided after a short while that i'm not taking these risks anymore and simply convert to freebase if i want to smoke. Although i also have to say that i'm a cigarette smoker, and they contain many salts. So i don't think smoking changa made with salts would increase my risks much. But, better safe(r) than sorry.
One non-health advantage that freebase has over acetate for changa, is that it dries/hardens completely, whereas my acetate changa liked to stay slightly moist for a long long time.
Regardless of what exactly you use for your changa, i recommend drying it for about a week more after it seems to have fully evaporated all solvent.
I'm not sure about the efficiency of smoked acetate, i never really weighed my changa doses.
Something i noticed - not sure if it has to be this way or i did something 'wrong' - was that freebase that i converted from acetate doesn't like to harden very well. If you end up having the same problem, use citric or fumaric for backsalting from limo next time.