If I decide to close vote a question as off topic for a specific site, I almost always give it a down vote along. My reasoning is that identified off topic questions aren't useful for that site at all.
There are rare reasons where I'm close voting questions without downvoting, which are usually:
- The question can be migrated validly to another site in the SE network.
- The question asks for 3rd party resource or opinion, but with valid research efforts shown
- The question is referring a hard to find duplicate in the SE network (if it's more affine to another SE site, my 1st reason would drop in)
Are there more reasons to leave out the downvote when deciding to give a close vote for a question (besides of being out of daily downvotes before close votes of course)?
Should we consider an automatic downvote applied with a close vote reason chosen?
Similar like flagging spam questions are automatically applied with a downvote.
If it's not the reviewers intend to downvote along, it's easy to retract after applying the close voting action.