What should Bonnie do (for work)?

Of course, I hear Bonnie and think witch, so I went with gardener, cause herbs and stuff are important to witches. *nods*

Both conservationist and gardener would serve her well. They are both semi-active allowing you to work from home or creating an office/lab for them (I turned Caldera Camp into a marine lab and turned San My into a vast botanical garden myself). Both are fairly fun, but my personal experience is that the conservationist career was more varied and held my interest more.

Another reason is that Sulani, for me, is the world that has offered the most gameplay, especially is you get a mod that notifies you of the various festivities and live in "town" so you can walk to them from your house. I loved taking my sim family to the family beach on Sundays, and joining the pot-luck nights at the town center. It's the one time playing where I felt my sim was really a part of a community.

She should be a robots entrepreneur and make and sell gardening robots. This way she can combine her passion for gardening with her interest in science.

Good for an outdoorsy sim, and maybe she could make contact with some mermaids instead of aliens?

These are all great ideas! Decisions, decisions…

I love the idea of her building gardening robots then selling them to fund her search for native plants to grow on her home lot while collecting relics, rare frogs, etc. That would give you several different choices for aspirations that are relevant to her personality, too.