For me, given an free choice it has to be a proper, valves and rattles (and if possible put the blower in a soundproof room) pipe organ. If only I could play the bass pedals properly.... I suppose a B3 wouldn't be too bad but around my parts I've never met one in a church!
On the other hand, a large number of the more recent hymns are clearly written for piano, and even though I think I'm not bad on the organ for a pianist I'll still switch to a piano if possible.
And if none of this is around my PSR3000 does a perfectly good job. Admittedly I don't bother with styles, I just play it as a piano or organ as necessary.
And if the guitarist (rock / acoustic / bass) or drummer turn up, there is always a place to be found; if they've made the effort to come along then I should make the effort to use their talents.
In the end, just do your best with whatever is available. You will always be appreciated because no matter what sort of mess you make of a tune (and I have) it is still far better than no tune at all.
[This message has been edited by MacAllcock (edited 09-19-2007).]
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John Allcock