Quite a lot has already been said here. I'll join in on trying out the seats. Comfort is the first criterion. Then, of course, the look. Additionally, pay attention to the seat height and armrest height. With armrest chairs, you have the disadvantage that they usually cannot be pushed completely under the table. Also, you always have to push the chairs back when getting up. Without armrests, you can also just get up from the side of the chair. The overall width of the chair is also important. Depending on the table legs, only two chairs fit on the long side. We have an internal leg on the table, so three to four chairs fit along the length of 2.3 meters. Swivel chairs (also with backrests) are practical for getting up, but so far I haven't found any that I like visually. These flared angled legs look very odd to me. Our chairs are from Lübke and have been in use for over 30 years now, solid alder with fabric seat. Works for us, but probably doesn’t help you much. So go to the furniture store, look around and test!
Oh yes – forgot: It is also important for me that the chairs can be moved easily. Some are very heavy or can only be moved with both hands because there is no grip edge/surface. Try it out!