I didn't start watching Criminal minds until I saw it on Netflix around the time they were halfway through season 11. I watched every episode and looked forward to watching season 12 in real time until I found out about the Reid storyline which made me sad for him so I decided to rewatch the series recently.
I'm on the fourth episode of season one and I am thrown by the differences from the older seasons to the newer seasons.
I think season one is interesting in that there are many explanations, alot of talking and not alot of action which makes sense when you think about the premise of the show. Even in the opening credits, they don't show them with guns. They show them talking, explaining things. Whereas in the later seasons, everyone is shown with a gun except Reid.
Overall, I really like Elle, although I perfer Blake. I also appreciate Gideon a little more than Rossi, although I don't know why.
One thing I noticed compared to other shows like white collar or ncis, BAU always uses last names except for the women who are called by their first names. It kind of sets this idea that they aren't as close as they try to make them seem in the later seasons.
I also really liked the way they presented the profiles in the first season as it wasn't that awkward everyone says a sentence thing. It's more of a conversation.
I also love that everyone is obviously appreciated in the first season, whereas in the later seasons, it doesn't always feel that way.