Yes, this is my first time reading them. Yeah, I can't wait to finish them. So far, I'm really enjoying them.
They get better - and more addictive - as the series progresses. This is one series where the final book - unusually - is not an anti-climax, but manages to tie up a lot of loose ends and complete story and character arcs in a very satisfying manner.
CoS in book form is the weakest but as a movie, it was one of the better ones in the Harry Potter series.
My favorites books in the series were "The Goblet of Fire" and "The Half Blood Prince"
I haven't seen all of the movies, but the CoS movie seems to be highly regarded. The book - while very good - to my mind, is eclipsed by what comes after.
I'm about to re-read HBP - and indeed, GoF, again; HBP is lying on my sofa as I write, and I must unearth (and re-read) the others in the series.
I suspect that HBP is one of those books which grow on you and is better after a re-read, especially in the light of what transpires subsequently. I loved PoA (but, again, haven't read it for years; GoF - which I haven't re-read at all, and OotP, when I read them). At the time, I remember being a bit disappointed by HBP - although I thought that Voldemort's backstory was brilliant. DH, of course, was an absolute tour de force.