I have a few thai consulates listed in the USA..

Does it matter which one I apply to for a non im o visa?

http://www.thaiembdc.org/directry/direc_e.htm

You want single or multi entry?

You are married to a Thai? Have Thai child?

Generally speaking the honorary Consulates are likely to be easier with documentation requirements.

I totally agree. I have used and many of my friends have used the honorary thai consulates. They ARE definately much more easily to deal with and don't ask for gobs of paperwork. You can do a search for Honorary Thai Consulates and a list will be provided. We have used the fellow in Albama, very helpful, good service and pleasant to talk to. He also has an assistant, female, that you may be speaking to. Doesn't matter where you live in the US, you can use any consulate location. Total turnaround time is 10-14 days.