Mostly self taught but I used to be a good violin player so an amount of musical knowledge definitely helped. Weirdly whilst I can read / sight read the treble clef music I still struggle to read the bass clef, no idea why. Thinking of having pano lessons in an attempt to sort this once and for all.
Thinking bass lines, the first band I ever joined (and am still with) is an originals band so probably doesn't count. For covers maybe the following:
American Idiot (probably the first I learned)
Dark Side of the Moon - taught myself to play the whole thing with a bit of tab help for Time
Ziggy Stardust
Can't Get Enought Of Your Love
Eleanor (The Turtles)
Nothing Else Matter (easy, but love the song)
Aspiring to learn: What Had Ye For Supper, Maddy Prior iirc, beautiful fretless bass part & Starship Trooper