I have been doing a another re-watch and am now in the dreaded Season 8. I should a modified re-watch in that I am only really watching the Dean scenes (don't judge me). It is amazing how better Sam comes off if I watch the show this way. lol If you had asked me before this re-watch I would have said my thoughts on Sam per season were 1 - liked, 2 - loved, 3 - loved, 4 - hated, 5 - disliked, 6 - meh, 7 - meh, 8 - hated, 9 - hated, 10 - present - liked. In the re-watch I am seeing that Season 6 and 7 Sam is not so bad with some specific story line exceptions (Amy). My Dean ratings per season were 1 - liked, 2 - loved, 3 - present - obsessed. Which haven't changed so far.
But here I am with 8 and even with fast forwarded the non-Dean scenes, Sam is a total ass. I have't even gotten to Citizen Fang yet (up next). Part of that is his irrational reaction to Benny. The character of Benny was just fire when he was introduced and the chemistry between him and Dean was off the charts. (I miss Benny). Dean didn't help by not explaining Purgatory but once Sam said Benny was the same as Amy (The situations are not the same. She had just proven she was willing to kill humans.) and he equated Dean not mentioning a friend to Sam as the same as Sam not looking for Dean I knew he wasn't being rational.
The other thing I realized is the recency bias I had toward Crowley. I had totally forgotten how EVIL he is. Shame on me.
One of the other things that has popped out on re-watches is how the nature of the boys switches in regards to friends. Sam was all about having friends and Dean was no friends at any time. But when you watch you see Dean making the connections with longer term characters and Sam not so much or only after Dean has invited these people in. This is not say Sam has none but the majority of "long-term" friends have a greater connection with Dean.