All's fair and opinions will be opinions, just that. No emnity my friends
Saw this on Wiki which was referenced, which is why I thought the episode was originally carded for Ten :-
"Gaiman began writing the episode before Matt Smith was even cast as the Eleventh Doctor; Gaiman envisaged David Tennant's performance in the first draft..."
According to The Writer's Tale, Matt Smith was cast before the end of the fourth series of DW.
IMO though, I thought being human was in essence what doctor who needed to really connect with this new audience (being newly re-launched) for day to day life to make it believable. In a way, what RTD was to actually pave the way for the SM timeline. I mean, basically, if you didnt go through the RTD process, It'd just be fobbed off like Primeval...
Plus being human provided the doctor with so much raw full-on emotion. A man who had been through so much and lived over 900 years must have baggage and an emotional life. I thought Chris and David really breathed life into The Doctor and that's what made it such generally a big hit and not just for cult fan boys but then again that's just IMO