Many enjoy space enough for even the largest throne, but if you have a small patch of land for doing your duty, you might want a smaller toilet AND you probably don't want to sacrifice flushability or style. We combed back through a number of posts to find out what the top recommendations were for small toilets. Consider this a starter list. Additions are welcome.
...quite pleased. It is compact and flushed well. I would purchase it again if I were re-doing another bathroom. - Lonnstrom
It's great, nice and small and uses very little water. It has "power flush" and is really quiet. Sasha
...You know, it sort of looks like sitting on a small trash can. But it is small.- AT
...projects 21.25" from the wall but I think it runs around $1000 and requires a plumber to install the tank inside the wall. - Yen Ha
The best small medium priced toilet I've heard of is the Toto ultimate (about 250$ 2 1/2 years ago). I polled residents in my building when I needed to change to a low flow model upon purchasing a unit I'd been renting and this model won. - Jonathan D.