How to create a good basslines?

[clear vapor]

I usually go with a more simplified version of my melody or alternatively the way that others do it, make something with some rhythm that follows the root note of the chord progression.

[umbral vector]

There's nothing wrong with bass just being root notes, but if you want more detail, https://www.youtube.com/watch?v=ujS0Viuv5kg this is a solid video to go from root note bassline to something cooler isolated

Bass is more often than not a bg element so many tend to simplify it, but you can bring out complex passages in fills where dominant instruments are in rest