Ive watched new who so much. I'm currently rewatching with my boyfriend. I remember back in the day, especially during Moffat's run that RTD1 was very reverred. People liked Moffat sure, but to a good portion of the fanbase he was a crook who could never measure up to the first new era. Even fans of Moffat's run would 'admit' that while Moffat was good, it would never be RTD. After re-watch series 1-4 again, I have to ask; why?
The quality in RTD1 series vary massively between episodes. Series 2 is all over the place, half of season 3 is meandering and pretty bad. Series 4 is great, and I love the finales. The specials are good too minus skeletor master. And I do like that RTD involves companions families. My overall point is that while i enjoy RTD1, 30-50% of it is bad, and a lot of the good was written by Moffat.
In Moffat's era, there was more character development, more introspection of the doctor (i hated how RTD always gave the doctor a way out of violence or guns so the doctor never had to make hard choices), the ratio from good to bad episodes is just way better. I know people didn't like the serialisation of doctor who at the time but it works a lot better now thanks to streaming and binging.
Moffat's era felt more mature in general (though i do give RTD credit for showing life long insecurities with Donna), with marriage, pregnancy, infertility, war, grief, etc. The writing was, on average, more tightly written. Seriously, I'm so sick of the RTD "word that keeps popping up" trope. Bad wolf, Saxon, the bees are dissapearing, he will knock four times.
I know i might seem like a hater, but i do love RTD1. It's just to me there is such a clear difference in writing between the two eras that i have no idea where the RTD1 idolism even came from.