Bridal Registry must haves?

Put everything on there. I felt so stupid doing it, but it is better to give people as many options as possible them for them to be limited.

Just get a checklist the one from BBB is great and can be printed on-line and use that is a guide.

I think you should amybe think about what things you may have used it the past or the lifestyle you envision for yourself and think how will the items you put on your list fir in with that picture.
If you love to do bbq's or think you will when you get settled, then look to put grill things on the list but if you hate the thought of cleaning the grease and gunk and will never grill outside why clutter your home with things that will wind up in the back of your closets. Storage room is too limited to waste that way.
If you love to cook, think about getting a nice high qyality cook set, knives everyday dinnerware. but if you have all the takeout numbers on the frig . . .
See what I mean?

Some really good towel sets and sheets sets, things you might not want to spend extra money on might be good to put on your list.
And a good vaccum if you have alot of rugs.
and a powerful dustbuster comes in handy.
HTH