I got vaper's tongue (aka, olfactory fatigue) about a week after I started vaping. That lasted a week or so and then went away. Nothing I did made it better, so it just had to work itself out. It just depends on your body, but it
will fix itself eventually. If you have some juice flavors that you don't like very much, now is a good time to vape them

.
I haven't found a good cherry yet, although I haven't looked too hard. My local shop's black cherry is incredibly medicinal and tastes like cough syrup (which I suppose makes sense, since they use pharmaceutical flavorings in a lot of their flavors.) Their orange creamsicle is utterly foul and one of the worst juices I've tried. I really like orange creamsicles, but this juice tastes nothing like it ("orange penicillin" would be more accurate.) I made it through about five puffs before my gag reflex kicked in, so the bottle has been hanging around in my cabinet for a while now and I'm trying to figure out a way to salvage it. But it's only a 10mL bottle, so not a big waste; always get the smallest bottle if you can't taste it first, for this exact reason!
I'm sure there are better cherry and orange flavors out there, I just haven't tried enough juices myself to recommend any.