I've gone through a number of changes. For a while, I smoked Captain Black almost exclusively, as well as Danish Delight. I still have an ancient jar of the latter hiding somewhere. My appreciation for English blends grew to the point that I smoked them almost exclusively for years, Balkan Sobranie, 759, and other well made English and Balkan blends mere my go to.
About 20 years ago I suddenly developed a strong aversion to Latakia. Just the smell of it made me want to hurl. I switched over to Virginias, which required me to relearn my smoking technique, as they are much more demanding. Today, I smoke primarily Virginia blends and their variants, like Va/Pers, etc. I love a good matured red Virginia.
Gradually, I've regained my appreciation for Latakia, though only in condimental amounts and only on the rare occasion. Also, I've become fond of semi-aromatic blends, more complex varieties than vanilla or cherry. Also, I've come to appreciate burley and "codger" blends more.