Yes, I marathoned the first 5 or 6 seasons on Netflix, then watched 7 and 8 as they aired, but found 9 too hard to follow in installments so went back to watching the whole series over a few weeks on Netflix.
Going to do the same with the current series.
I preferred seasons 2-4 though when they were focused mainly on killing supernatural things and less so the newer seasons with more emphasis on the angels etc.
I prefer episodes where they head off to some random part of the country to 'kill' something ghostly etc. lol.