A lot of people feel the very same way. They also say it is difficult to dust behind a free-standing tub unless you have a ton of space to waste and have it sitting way out into the room. Then you will have it too far from walls for any help from grab bars masquerading as towel bars, so you are completely on your own getting in and out! They are only for the very able persons in the prime of their lives. And photographers.

I like drop-in with a deck surround. That way you have a place to put things. DS has under-mount with deck surround. It's uncomfortable to lean your head back in that scenario because the deck (marble, granite, etc.) is poking you in the neck or head. With drop-in, your head will rest on the contour of the tub you choose. Also, depending on the size of your decking, you can lay a stack or towels there, sit down to put on shoes, etc. My friend has all kinds of pretty jars of bath salts, etc on hers. Mine's not so big, but I do put a pretty soap dish there, a small picture, candles, etc.