In reply to HeMa:
> In fact I've personally come to the conclusion that up to the size of purple (so C4 size 0.5, I guess that's like Dragon 1?) I prefer micros.
That was previously my view but I've changed my mind, slightly.
I had micros (WC Zeros) and then Dragons from Purple upwards, but a lot of the time I wasn't entirely happy with the largest micro as lots of my placements were in slightly irregular cracks where a physically larger standard cam would be better.
I bought a couple of Grey Dragons and they now they get used lots and I'm happier with that being the point I change from standard cams to micros.
That said, it probably depends a lot on where you are climbing. On Pembroke, Swanage and Rhoscolyn I definitely found the standard grey cam a better option as the cracks are relatively long and deep but quite irregular. However, on rock types with shallower or shorter and more smooth-sided cracks like slate or fine grained granite, the opposite may be true.