@ehBeth,
I used to use unsalted butter (my local creameries have salted and unsalted) for just about everything. Recently, due to cutting my grocery spending, I buy salted - but, but, but, I use way less salt in my cooking than most recipes call for, in baking or otherwise, and usually at least halve the sugar. In making soups, etc., it depends on what I'm adding. If I add anything that has come in a can or package then even with rinsing it will have a lot of salt to start with - I usually don't add any at all.
I tried an irish butter years ago that was delicious; forget the name. I tried some irish butter more recently, perhaps four years ago, and ... eh! But I don't think the brand name was the same as I've been seeing in some posts here, so I suppose there is some out there that I need to try. Probably at Whole Foods, or TJs, but I never get to either of those. I guess there is nothing like real butter from your own grass fed cow..