I used affinity designer in the period when it was in beta. Even then, affinity designer had easily taken the place of illustrator for me. Designer controls & ux more similar to photoshop. Also for complex boolean operations I think Affinity Designer is the best +very successful opening ai files. I live pretty much the same things. For UI design my main hand is sketch and I rarely using ps and ai. I dont have much experience with Affinity Photo but I really recommend Affinity Designer.