Not really- I've cooked that many paella's over the years that I just wing it most of the time. I make up my own spice blend of smoky paprika, spicy pimenton and saffron threads. Always have a pot of stock next to the KK as I've found that the precise ratio of stock to rice can vary a bit. I make my soffrito with grated fresh tomato, but to be honest tinned also works. Good rice is obviously the key- and I've had great results with Bomba rice or Calasparra rice.
What I have learnt is that in general less is more in terms of the flavours- so I no longer go for the maximalist paella which has chorizo, chicken and seafood. Rather- I either go for chicken and chorizo, or seafood with prawns, calamari and mussels. Every now and then it's nice to cook a paella negra with squid ink and calamari as the only ingredients- served with aioli.