I liked Bradley Walsh as Graham, because he had a clear personality--his dry humor, his calm "oh-what-the-fuck-now" approach was refreshing. Aside from the first episode, I don't feel like Ryan had much to do--they just didn't develop him enough and the actor wasn't really capable of standing out among the group.
I hope they do more with Yaz. She had one or two nice moments but, like with most companions, she needs to be pretty forcefully developed in order grab the audience's attention. The companions have to be strong on-screen personalities when they're standing next to the Doctor or they just fade into the background. I feel that the writing for this series overall just hasn't been very strong and that shows in the companions--to me, they feel fairly nondescript.
I hope they do more with Yaz. She had one or two nice moments but, like with most companions, she needs to be pretty forcefully developed in order grab the audience's attention. The companions have to be strong on-screen personalities when they're standing next to the Doctor or they just fade into the background. I feel that the writing for this series overall just hasn't been very strong and that shows in the companions--to me, they feel fairly nondescript.