The answer to this question depends in some respects on personal preference. And it doesn’t have to be complicated – just remember that light and air are the enemy!
As for the different packaging available, glass, lined tin, stainless steel, aluminum, bag-in-box, pouch and PET plastic can all be good options to help store and preserve the oil, as long as they have a secure seal or cap to keep air out.
Exposure to light will degrade olive oil over time, so if you plan to keep your olive oil in a glass or plastic bottle on an open shelf or kitchen counter, you’ll want to look for darker-colored or opaque packaging. That said, olive oil in a clear bottle that has outer packaging that protects it from extended light exposure before you get it home could be excellent. If you store it somewhere dark, the minimal light it will be exposed to isn’t going to harm it in any appreciable way, especially if you tend to use olive oil pretty quickly.
If you’re concerned about sustainability, you may be interested in r-PET, which are bottles made from recycled plastics. Plastic packaging is also lighter in general, which helps reduce the carbon footprint of shipping. Increasingly, olive oils are being sold in bag-in-box, pouch and light metal packaging, which can be good options with relatively lighter environmental footprints.