What is there if not the journey. I still choose life.

Even after being partially disabled for a decade and in near total isolation presently, I still choose life now, as I would then. Boredom is a lack of creativity. Perhaps the entire universe becomes the slow moving simulation of my mind for the Postbaryon.

You eat the same repetitive foods in a cycle just beyond conscious awareness, and yet you do not tire of eating. I can dance to life forever, despite the rhythmic procession, or effrons quale.

Imagine being at your evolution level and watching living creatures slowly become genius levels and you're just like a novel pet or exhibit to far superior beings. And like, it just slowly, painfully happens, while your unforgettable past haunts you of times where you weren't so isolated and alone, where there used to be others of your kind. Just trapped for eternity in a future you're long since naturally compatible with.

And all the time you're dealing with whatever the expansion of the Sun brings...

OP', I choose a gun to blow my brains out when the novelty wears off.

I'd say living for eternity doesn't imply being conscious for that time.

Edit: Eternal recurrence could be a fun thing to witness

Do you know how long it takes to do everything?

Eternity. I doubt even with all time forever you'd be able to do everything. Our world is ever-changing, much less the wider universe.

The one stipulation I'd put on living forever is the ability to change with the universe. Who's to say physics will even allow us to perceive reality in a few billion years, if we're stuck the way we are?