I've been using GNOME for 2-3 years now.
I like its workflow, especially the activities overview on which I grew quite dependent.
When using any other DE, Budgie included, I'm really missing it. In Budgies case, what's even worse, is that not only there is no activities overview, the method for navigating apps via alt tabbing is clunky for me (I prefer navigating them via the arrow keys like on GNOME / Unity). Yes, I know Budgies method (alt tab / alt tilde) is more traditional but that does not make it any less clunky to me.
If Budgie were to get a functionality like activities overview, I might consider giving it another try.