Storm Front is much closer to the 'noir' feel than later ones, but, then again, Harry's done a LOT since that first book. There's a lot going on and as it goes, we learn more and more about pre-Storm Front Harry. It's not easy to balance character development and backstory with 'casefile' plot and keep everything the same as the beginning.
Heck, Jim's even said if he were to write Storm Front with the 'knowledge' he's gained, it would be a completely different book. XD Though, I don't know that it would work as well, I like Storm Front for what it is. =)
Then we should be glad he cant write Storm Front again.
Cause as you say it had more noir feel,solving a mystery to it than others with huge important storylines like Fae wars,Fallen Angels etc
That made me a fan. I wouldnt feel the same for a more typical urban fantasy full on magic,demons,vamps etc from the start.
I think he should go back to alittle to the elements of the first two books. Not that should a stand alone casefile plot but to balance things. Make it more simpler for Harry. Im reading Death Masks and it is too many enemies,storylines at once. Its good but could be more fun if Harry had act like an investigator again. Now in this books he comes up against his enemies because they find him,hunt him down.
Only crime,noir things left in the series now is the type of character,humor,the mystery in the first few pages. Thats a shame imo.
Not saying i dont enjoy the big important storylines focused books.