You hit one of my husband's nerves with water conservation. Hoo boy! I dare not throw out the pasta water, starch is good for the plants. The toilet is definitely his pet peeve. He wants to install one of those two-button systems, but we have a very old American toilet in our master bath that I adore. He wants one of those low-capacity system with a "jet-flush" and I'm scared to ask him what that is.
As for self-flush, meh. Like you said, it always flushes twice with me. The only downside is anyone waiting thinks I'm finished so I have to tell them to wait. So I guess I don't care for them either.