Find it extremely peculiar that these choices should be viewed as opposite. Very very dumb poll. Because I happen to do both. Equally. A tiny tendency to get to the audience moreso since the bass is an instrument you really should play together with other musicians. A guitar or piano, one can take care of it all, bass lines, rhythm, melody at the same time, so you're more egomaniacal on those ones. Great classical pianist and mega-eccentric GLENN GOULD went into hibernation and just played for himself. He recorded it though, and let audience buy it. But still found performance and recitals extremely gladiator like events.
If left on a desert island, I would not bring a bass, but other instrument, that I could play for myself only.