Old anime series (pre-90s) | Bulbagarden
Anyway, old series I've seen that pre-date 1990 are:
Ronin Warriors
Adventure of the Little Koala
Mapletown
Hello Kitty Fairytale Theater (I think it was called, used to come on Saturday morns on CBS)
The Lil' Bits (Originally from 1981, but released later on in the late 80s or early 90s, iirc)
Noozles
Voltron (Lovely 1984...being forced to watch this because my older cousin had control of the remote. lol)
G-Force (originally from 1972, dubbed over in the late 70s and last until I think the mid 80s because I vividly remember it/something else my older cousin liked)
The first original Gundam series from 1978 (or either '79)
Speed Racer
Gigantor (1960s series, but the storyline was changed to suit a US audience, as part of the story dealt with WWII...for here they changed the time to being "the future" as opposed to being present-day 60s)
Grimms Fairy Tale Classics (or whatever it was called. lol)
Dragon Ball (Z started in 1989, original DB was about '85)
City Hunter 1987
Sazae-san (well, I've seen the first episode of the series and some later eps [present day], the series began in about 1967, iirc)
That's about all I can think of right offhand and I used dub titles. I do think it's changed a bit over the years. Seems more flashy now-a-days and in all honesty, I can't fully get into many newer shows. Same with some video games. Seems there's more focus on visuals and graphics as opposed to content, gameplay, or story. Sometimes, it's like you're watching a movie.
As for the big eye thing, that's based off of early Disney animation. Disney was very influential to that aspect of Japanese animation and has been used ever since, I guess. As for the stories and such...well, some stories will always follow a set formula (given the series' genre). Like in a shounen series, it'll be aimed towards guys so not as many female characters in a strong role, and in a shoujo series, mostly female-oriented, etc. I guess it's just case-by-case in this regard, but animation wise, I still prefer the old style and always will.