Not me. I prepare a part because it's the best that I can bring to song. Then I play it.
If it means playing boring quarter notes or even whole notes (on occasion), then that's what it is.
If I was concerned about what a "serious" bass player thinks, I'd hope they would understand that it's usually not about being flashy. If not, then they're not "serious".
Here is my point about a "boring" bass line that sounds so perfect for that particular song, its arrangement, etc...
Only inexperienced, less knowledgeable, less confident, etc... beginner bass players think that adding more notes would "improve" the bass line and would show "how good that bass player is".
Not in my world.
I could bet that 98% of TB members would not describe or explain WHY at this or that particular song - let's say from Tom Petty's repertoire - the bass player plays that "country bass pattern" only by using the roots.
Music is NOT some "it's me, me, mini me - bassist who can play a lot of notes". The bass line is a part of the well-crafted song's arrangement, which starts with Mood, Character, Attitude, etc...
Let's go further.
In my world, even the quarter note from the bass line does NOT last exactly as one quarter. There are SO many nuances.
Only some "bass players" hear and enjoy the bass line as something SEPARATE from the song, something that MUST show the bass players technique(?), desire to impress another "similar" bass player?
When I play that simple root-based bass line, I have lots of requirements, starting with my bass' tone, character, its place in the overall band's frequency spectrum (which could affect my tone, mood).
What about that necessary "tightness" with the drummer, other rhythm group musicians.
What about the band's overall DYNAMICS???
What about those small/tiny "tutti" with the other instrument/s or with the drum part, similar accents - clips - that shows me, "Yes, we have a Band."
And so on...
It's like we are selling the final product that is READY to be heard.
We are not selling "look at me - the bass player. I can twist, I can do this and that".
In short.
What is the need to learn the bass guitar, Music Theory, Harmony, Bass part in contemporary music if that bass player cannot figure out the basic bass guitar foundation and requirements of the STYLE, Genre, etc...
There are LOTS of times when the bass guitar exhibits "cool" patterns, riffs, but there are lots of times when the bass guitar has some different requirements.