I loved Doctor Who as a kid, and I loved the reboot. Thought Ecclestone, Tennant and Smith were all great - the odd duff story here and there, but generally very good.
I think Capaldi had some great episodes, but got off to a very rough start - the personality change was a bit too jarring. Obviously each Doctor is different, but the Ecclestone>Tennant>Smith regenerations felt a lot more subtle. Still watched his entire run, felt it improved once Clara was jettisoned and Bill came in.
We tried with Whittaker, but eventually ended falling off. She had a few good episodes, but her run was generally a bit boring, and the scripts she was given gave her Doctor a sort of Temu Tennant energy, but without the underlying gravitas and darkness of an ancient alien.
TBF I also wasn't a massive fan of a female Doctor (or the Master for that matter, but Michelle Gomez as Missy was great), just because it wasn't a clearly established fact that Timelords could switch sex on a whole, and it seemed a bit weird that every regeneration had been male. I also kind of appreciated the Doctor as a role model for boys - a bit weird, a bit quirky and nerdy, but still a powerful Hero who uses his intelligence to overcome evil. But I was willing to give Whittaker's run a go, but although I felt she had the potential to be great, she was hamstrung by boring stories and flat characterisation. I never even got to the Timeless Child stuff, but I've heard from friends who persevered that it was terrible, and messed with established canon in a pretty bad way.
Not even attempted Gatwa's run.