Well, since my name has been taken in vain here, I think I'll continue the pro-anglo thread drift.

Yes, I do play right hand chords, but [i]in addition to[/i] chords on the left hand, either when accompanying a song or - in a tune -when chucking in an extra note or two alongside the melody note on the RH. I don't do that thing MtheGM does of playing LH melody against RH chords, though (very confusing!).

In response to Michael's original enquiry:
"I have had people express surprise at my tending to play the relative minor rather than the major of the subdominant on the Anglo [eg Dmin rather than F when accompanying a song in C], which makes for an smooth in-out action, and generally provides a satisfactory accompaniment; rather than the hassle & gasp of constant use of the air-button."

First, according to classical theory, A minor is the relative minor of C major, not D. However, D Dorian shares with C maj the key signature of no accidentals, and can be played on the buttons of the C row of an anglo, so many people get confused. As to substituting it for the F (subdominant) chord, that's something I do a lot, and suggest it to students as well, mainly as a means of providing a slightly different musical colour. Though since both F maj and D min are pull chords on a C/G anglo. I'm not sure why this affects the bellows or the air button.

The other thing worth mentioning is that a lot of Anglo players who haven't sorted out properly what their LH fingers are actually doing, end up playing involuntary D min chords all the time, since this is the easiest pull chord to play on the C row (adjacent buttons 3,4 & 5).

And as to why Tootler leaves out the F in a D minor chord, it's because the 1 + 5 chord has a starker, stronger sound than the mawkishly melancholy minor triad. Not for nothing do rock musicians use the 1 + 5 as their standard 'power chord'. The third has its uses, but my default chords generally avoid it.