thanks gwern. I have replaced #2 and #4 with I would like more nuclear power in my country. and I keep the place where I live clean and orderly. Thoughts? This probably needs to go live on the weekend.

Thanks for your suggestions, but our problem is seating for the reception, not so much the actual ceremony.

AFAIK, no to the former, and definitely no to the latter: I just made them up. I was hoping that the statements would provide interesting discussion points in addition to personality discrimination. Big 5 tests seem like they might be a little bit less fun for guests to fill out. I acknowledge my lack of academic rigour here.

Thanks Manfred!

Here's my current proposed list of statements for people to (strongly) agree/disagree with -- no neutrality allowed. The idea is to identify people on a farmer/forager axis, and then to cluster people according to similarity (subject to other constraints).

1. If there were cheap, tasteless, food pills that gave you all the sustenance you need, I would barely eat other food.
2. I believe it's everyone's duty to vote.
3. I regularly exercise when I should be working.
4. I think governmental oversight unnecessarily slows down the progress of science.
5. My clothes are definitely more about style than comfort.
6. I believe that travel is over-rated.

The wedding in question is actually mine; I'm very grateful to alexflint for posing the question here.

The plan is to provide a brief online (fun, hopefully) test to all guests, and then use a combinatorial optimisation algorithm to assign seating so as to maximise conversational compatibility.