I have a range of top airflow
tanks, but have forsaken all but the Zeus X.
The sole negative I've found in 2-3 years of using only top airflow
tanks is that they will flood until you get the wicking right.
Every (and I mean every) other bottom/side airflow tank I own, and there are a lot, leaked through the airflow at some point. Most would be just fine for days, then just dump. My final straw was a trip through the Rocky Mountains. Up a mountain, down a mountain. Wipe the tank and mod down, refill. Do that for 14 days.
I vape unflavored, but when I did flavors, I never found a large difference between tanks regarding flavor. Then again, I always had excellent tanks.