What do you rent vs. buy?

Hello everyone, I am new to the diving world. There is a plethora of choices for gear, and supplies. It’s a little overwhelming but I am slowly getting the hang of it. I know that a lot of people buy and own their own gear. A lot of people also just rent their gear when they go diving. I have the basics (mask, snorkel, fins, boots, and gloves). I am just wondering what pieces of gear should I buy versus having to rent it when I go diving? I plan on adding a wetsuit to my collection soon, and possibly a dive computer (oceanic geo 2). Should I be considering purchasing a BC as well? I appreciate any input!