Forty years ago I didn't know much about music, until I moved to Austin TX to go to graduate school, and suddenly I was surrounded by guitar players...and I married a guitar player, at that! I bought a cheap Ventura flat top from a friend and took lessons from a local fingerpicker.
Then my wife young son and I moved to Medocino, where the nights were long and cold in the winter, and I began reading my wife's music theory books, and I started playing slide guitar, and then harmonica.
I started playing with a song writer/guitarist in the early '80s, now back in Texas, and recruited a bass player to make it a trio. I was the lead instrument, electric guitar, lap steel and harp, and it turned out the bass player wanted to play guitar on certain songs. So we'd trade off.
I was heavily into Dobro and pedal steel in the '90s, still occasionally swapping out on bass. Then in the early '00s I recorded an album for a local group of folkies who didn't have a bass player, so I contributed bass and Dobro to the CD.
Then the leader of that group referred me to another singer, who wanted to do a one-shot gig opening for another musician's CD release party, so I learned 16 songs in 7 days for that job, and we struck it off pretty well. That led to a multi-year bass gig with a working dance hall band, and after it broke up, I started getting regular referrals for bass playing.
Now, thirty years after I first picked up a bass, that's about all I play except for the once-in-a-while Dobro or harp job (there are so many guitar players around here, I don't even try!).
Here's my take: the lead is the siren on top of the fire truck, but the bass and drums are the motor driving it down the road.
The last three years my combo (guitar, percussion, bass and two singers) has been specializing in pop tunes from the late '20s-early '60s and it's more fun than ever. Playing guitar you often are being told "Play that lick that's on the record" but with bass you can be a lot more creative.
I'd like to do original music on the electric guitar (as I have in the past) but the bass will always be with me.