In reply to youngtom:
> Whilst we're on the subject, what are folks preferences for sharpeners?
> I've been meaning to get one for our kitchen and was wondering if there was much difference between the different manufacturers and types.
There's definitely a difference with what you pay for but mostly in terms of speed and density, i.e. a good stone will cut faster and wont spit bits of stone out which will ruin your work.
It's quite an investment if you're not already sold on the idea of spending lots of money on big flat rocks but I'd recomend the naniwa super stones without hesitation (about £40 a pop, they do cheaper ones which I haven't used but have heard are good value.), I used a few 20 quid ones for a long time and the superstones were a revelation. It's much easier to stay consistent and so quick to get a decent edge with them. If you've got a bunch of old knives to sharpen invest in an extra course stone and it'll save you hours, after that you'll get on fine with a mid grade (400-600) and a fine (1000-2000). I have 400, 800, 1000, a 2/4k combination and a cheaper 8k, anything over 2k is really only for your own masterbatory pleasure at the finish and in reality wont make a difference unless you're stropping them instead of steeling them.
When it comes to the steel about 90% of the steels on the market are far too aggressive for me and can easily undo your good work if you're not very gentle. I like a fine grain that runs horizontally with the handle (i.e. not spiral), I've never seen a diamond one that isn't designed for taking metal off and my understanding was that they were more aggressive but perhaps you can get more gentle ones too (going from the comments above). If you keep a steel in a kitchen for a few years it'll get greasy and gummed up, horizontal ridges are easy to clean out with a brass wire brush or possibly a steel one if you're gentle. They should last a long long time.
General rant aimed at no one in particular - It makes me cringe every time I see a chef on tv bashing their knives off a steel. You need a couple of gentle strokes on each side every time you use it, the aim is to true the edge not take metal off. After you've spent hours getting the perfect angle on a flat stone mashing it against the steel at lightning speed while it wobbles around in the air will just make you cry in the long run and over time leave you with a wonky blade, usually concave in the middle of the belly where the steel makes first contact as in the bottom one in this -
http://i.ebayimg.com/images/g/-5MAAOSwHnFV3xc6/s-l300.jpg couldn't find a better photo but you get the idea, there's no reason that poor knife couldn't have lasted a lot longer, if I lived alone I expect I would never sharpen my knives and they get used every day, once they're sharp there's never really any need to remove metal from them if they're treated nicely.
Post edited at 13:00