These days I exclusively use Altbergs. I bought my first pair several years ago:
I've still got them, but don't wear them much any more as they're too warm for summer use. But after several years use they are as comfortable as an old pair of slippers, tough as old boots and still completely waterproof. They provide more than enough protection (CE approved) without resorting to nasty plastic, and as they have a proper sole unit they cope very well with walking duties too, as well as providing reassuring grip on poor surfaces - unlike Daytonas.
Now I mostly wear these:
Similar, but lighter and a better all year round boot for the UK. All the excellent qualities of the Clubman Classic, with the added bonus that work give them to me for free. Comfortable enough to wear for twenty hours plus, including plenty of leg work and standing around. Completely waterproof, nicely made. So good I have two pairs, one pair for day to day and one pair bulled to perfection for those special occasions.