I would definitely go with a regular door.

Can you elaborate on why please?

If you have a regular door, and it swings out, will it will be blocking your access to half of the kitchen? For example, you go to the pantry to get a couple things out for dinner. Where do you set them down? Will you have to shut the pantry door to set them where you want them? Or, will you be able to set them on the island before shutting the door? Is a full door going to hit or come close to the island? I'd prefer a full size door (for looks), but only if those things are not issues.

Also, I happened to notice that you don't have any supports for your island overhang. I strongly suggest putting in supports. I've heard of people with granite overhangs not supported, that actually cracked.

If you dealing with a laundry room upstairs or a small closet out of the view, bi-fold doors are OK. If you have a kitchen or other frequently used area a regular door would look much better and is preferred by most customers in the kitchen or any gathering area.

Good luck

Coming from someone who"s had folding doors, I would say traditional doors work better and look nicer.

Either a regular door or French doors.

I concur that bi-fold doors are not a good option for a pantry where frequent access is required. Bi-swing doors require you to open two doors each time you need access so I suggest they're not a good option either. However, I do like the scale and appearance of the smaller doors as shown by Rinqreation. You could marry a pair of these type of doors together to create a single door that appears like bi-swings, but is hinged on only one side and opens as a single door.

Maybe a pocket door? That way it will not swing in or out and take up space

You cannot do a pocket door on the angled pantry closet.

Single door or French door.

Regular door or glass door. One large pane of glass instead of 10 or 12 will make it look less busy. I would put in a light in the pantry that goes on when door is opened and goes off when door is closed. That way door will always be closed.

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Have you thought about doing a regular door with a frosted glass in-lay? This would add some visual interest you could even put the word pantry stenciled in. Bi-fold doors can be a pain in my experience. Good luck!

It appears that an in swinging door would be the best for the pantry. Are you thinking of butting the refrigerator up to the pantry? Keep in mind the swing of the refrigerator. You need to open the doors wider than 90 degrees to pull out the drawers in the frig and the pantry wall may prohibit that as it sticks out farther than the refrigerator does.

A door swing into the pantry would seriously impact the usable storage inside the pantry. The door should swing out in a direction that won't impact adjacent appliances.