I've actually been rewatching the whole series over the past few years and I'm almost back up to date (well, 2016).
Yes, I remember there being run of really dramatic stories leading up to Den's first death and then Arthur declares Walford "a misery-free zone" and then practically overnight it becomes one! Fascinating to watch in retrospect though. Frank Butcher really stood out for me in that period.
Yes, I appreciated the early years a lot more the second time around. It felt a lot bolder and edgier than it did at the time when I dismissed a lot of it as watered-down Brookside.
Oh man, I loved the 90s so much! The David Wicks era, Educating Michelle (thanks to Rachel Kominski and Geoff Barnes), Tricky Dicky on the market, Mandy and Aiden, Arthur and Mrs Hewitt. That was one of the show's richest times for me.
That's when I fell out of love with Enders originally. Steve Owen and Tamsin Outhwaite seemed too glamorous; all the other male characters became either psychos or buffoons, and it started to feel like a generic soap, just like all the others. But again, re-watching, I enjoyed it all a lot more. Mel may have been a vaguely drawn character to begin with but Outhwaite really turned her into something special. I was right about Steve Owen though! And the Slaters were terrific, much better than I originally appreciated, although after Little Mo hits Trevor with that iron, you do want them to be quiet and go away for a while.
I've actually started doing a one-man play about an EastEnders obsessive who gets a small part in the series and everything goes horribly wrong. Les Coker, Carol Jackson and the penultimate Lucy Beale have been to see it, as well as some behind the scenes people. They were all really nice, especially Carol who is just the loveliest woman.