Like others have said, it can depend on flavors and steeping time. What kind of juice is it and how long did you steep it for?
Also, vaping one flavor for too long (regardless of store bought or not) can bring on vaper's fatigue if it's the only juice vaped.
I did kind of have to "reset" my tastebuds from storebought flavors once I started DIY, but that period wasn't such a long time....
Could be several things, possibly all at once. But, I will say congrats on your first flavor! Sometimes mixing some one shot flavors that you can vape immediately without combining and steeping can be useful, as it gives the necessary patience for adequate steeping.
Anna