Avocado wood is very oily and gives an acrid smoke. My family has an avocado grove and we used to burn the trim wood for heat when I was growing up. Be cautious trying to smoke with it, while I have never tried it myself and can't say authoritatively that it is unsuitable I'm not inclined to think it is.
Edit: I should add that there are a variety of species(Haas, Jollna, Fuerte, Bacon, etc) and one might work better than others.
22.5 OT, 18.5 OTS, Smokey Joe S, Hybrid Smoker