I dislike sets in general..

So I told our GC we'll handle it later ourselves, and then searched things that made sense in each bathroom since each bathroom is different. We did ask for a towel bar instead of a handle on master bath's shower door. The rest of the stuff I found from allover or repurposed, and mostly it's freestanding, since either a space dictated it, or I didn't want a feeling of permanency, or I could double the function of the thing (say we do have a shelf with hooks for towels in kids' bath, because we had it from previous sellers..so we painted it, and I can have nice things on the shelf, not only towels..; and have a basket with a little bar for toilet paper in the master bath toilet-so you have space for both paper and reading materials lol,..) so on so forth. I dislike everything that looks strictly functional..some things I can't do much about like electrical outlets or vents, but here it was more satisfying for me to gather stuff.

I did see extremely nice bars and holders, on Etsy for example... Many sites, actually. They'll be more expensive, yes, but I'm fine with spending on accessories(if it's within reason) since I do want to use and love them for years. But after long consideration..just kinda liked the walls as clear of bars etc as possible.

Depends on your style though. I like vintage, and custom made, and generally for things not to match..and I don't like spa feeling, and zen feeling, and all that stuff..I don't even like white towels..unless I'm in a hotel. Ah, I also don't want hotel feeling.

And plenty of people do like for things to match. Etcetera.

In one bathroom I got the tile-in semi recessed toilet roll holder and tile-in ceramic brackets that for a towel bar in the shower. They blend with the tile.

In one bathroom I had a custom, fully recessed toilet paper and spare niche fabricated out of Corian that fit in with the tile layout and matched the tile.

For towel bars in this and another bathroom I used Kohler Purist Grab Bars.

I like using grab bars that are well anchored for towel bars because first, they are more sturdily mounted. and second because they can be used as grab bars for assistance now or later in life. Because I obsess about such things I also bought some extra so if I want to add some in 20 years I will have ones that all match.

I personally do not like fully surface mounted toilet roll holders, so where the recessed ones went, and where all the towel bar/grab bars went required that this be thought about in the Framing stage of the bathroom. Because the recesses and framing can't interfere with each other and you need extra blocking for proper grab bar/towel bar mounting.

I think one of the reasons that surface-mounted ornamental sets including the toilet roll holder and such became more popular is that nobody needs to think about where it goes ahead of time. I rarely see an old bathroom (1920-1970) that didn't have recessed or more built-in/permanent looking roll holders and stuff. (Especially toilet roll holders). Partly it was because the area allowed for the toilet was smaller, too (12" on center vs. 15-18" today), but part of it is that nobody needs to think about it until it's time to stick it up.

I work in an office building and they remodeled the lavatories and went from stalls to cubicles where the toilet roll holder was surface mounted and one by one each one was pulled out of the wall because people used it to hoist themselves up. They had to change them all to those big commercial style holders.

Long answer, but in general, I like grab bars for towel holders and I like them to be more ornamental and coordinate with the bathroom rather than the utilitarian sort. Kohler options are pretty expensive, especially Purist, but I figure I am doing it once.