If this were a poll my vote would be to install 32 bit Office only. Unless you're using extremely large numbers in Access (bigInt) there is no benefit IMO. However, there will be some hassles over API functions needing to be converted if using any of them. There's even one API that won't work in 64 bit at all (can't recall what it's for). IIRC, compiled db's must be run on the bitness they were created in, which would mean having a version for each until there are no more 32 bit Office machines in use. That's just more to maintain. Some day we might not have any choice, such as when/if M$ drops support for 32 bit Office.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.