(I'm speaking of instrumental bands here, not solo singers who use piano backing because that varies so much depending upon the artist): I don't like them 95% of the time because they're so often unimaginatively played by people who simply bash out the same three vamp chords, which dominates tonally and doesn't take any real skill to do. I like keyboards to be subtle, interesting, to be able to carry the melody instead of ONLY chording along, and to not take over.

Pianists I like (these are only the ones I can think of off the top of my head at the moment, so this is not a comprehensive list - there are others too):

Micheál Ó Súilleabháin

Kevin O'Reilley (??I think that's his name) in the band North Cregg

Paul Machlis, who plays sometimes with Alasdair Fraser

Another Irish fella with a very straightforward name - so straightforward I can't remember it, Pat Something? He just put a record out a few months ago which has been aired on Irish radio.

Reg Hall, as Dick has already mentioned.

There are certainly more - but sadly they're outnumbered by piano accompaniments that I hate. Never heard Belinda but she sounds like one of the good 'uns.