[Bignij]

I've done a search for this but can you imagine how many returns a search for 'metal sheds' returns on an allotment forum. :shock:

So, what's best. My gut instinct tells me wood would be best but I've no evidence or facts to substantiate my hunch.

[compostqueen]

Oh I think deffo wood     With wood you can knock in those oh-so-important nails for hanging things from, and screw-in cup hooks and tool hangers, not forgetting shelves and worktops.  It sort of evolves as you need a place to hang your onions or car keys  

[Celtic Eagle]

The tin ones get very hot as well !!

[Gwiz]

wood, most certainly!
I've put up a few of those metal monstrosity's.As celtic Eagle says, very hot in the summer, and riddled with condensation in the winter (rusty tools)

[noshed]

The wood ones are easier to 'improve' and the metal ones seem to be a bit tinny.

[Browser]

The playgroup my wife works at had me and some other dad's put up a 12"x8" metal shed after some charmer burned down the wooden one they had. They now have a metal shed that (a) leak because the same charmer came and jumped about on top of it, denting the roof panels and (b) a horrendous condensation problem, caused by the metal getting colder than wood would and condensation forming on it.
I'd get  a timber one if t'were me

[hindy]

Wood without a doubt, the plastic and tin ones can build up condensation inside and can get very hpt