I started watching around the end of season 4, and started shipping them with Demons. Scully was so devoted and Mulder was such a mess which I found incredibly attractive, lol. I think I never got the notion that they belonged together out of my mind after that, so while I caught up on the entirety of Seasons 1-4, I saw nothing but love, love, love everywhere I looked
And also, (this is probably my hopeless romantic side speaking) it feels like they were playing hide the salami all throughout season 7, maybe even after Millennium, just off camera.
Haha... I wish I could say the same. I don't know if it was just me, but I felt completely robbed by the bee in FTF, and it was never really the same after. I *hated* the way that they didn't even acknowledge that happened in Season 6 and then the Fowey was mucking everything up. I mean, she was creating mad tension between our two leads in all the eps she was actually in, and then when she wasn't around it was like M&S were supposed to be "getting closer" and they were trying to give shippers little nuggets to hang onto in different eps, but I never forgot that the Fowl One would be around come the next mythology ep and it made my stomach hurt even when they were flirting in MOTWs. I have issues though.
I found Season 7 disappointing in that way as well, but in rewatches there are a few eps where I can see it. I am happy they finally got them together in later seasons, but I really enjoyed 1-5 and FTF the most in terms of relationship stuff. With a little HollywoodAD/Requiem/Existence/The Truth thrown in for good measure