Pumpkin-steam or roast?

I almost always roast. It draws out some of the liquid & deepens the flavor...

It depends on the kind of pumpkin. If a varietal like Kabocha is around I steam because the flesh is quite smooth, tight and hard. A little extra moisture helps. If it's a Sugar Pie or Spaghetti Squash I would tend to roast because I want the extra moisture to evaopate, and those varietals with more inherent water could use a bit of the "flavor concentration" that comes with roasting.

I also roast. If it makes a moisture difference, it is to the better. Pumpkin has plenty of water.

I always roast and it works beautifully. You can poke holes in the outside skin to let steam escape if you're worried about it being too wet. I'm not sure if it makes much of a difference, though. There is a lot of variation in the juiciness of pumpkins, so if it looks really wet once cooked, cut it up into small pieces (or roughly mash) and drain in a colander for a half hour or so. Also, if making a yeast bread, allow it to rest after you've combined the ingredients and started to knead, for at least 20 minutes, to allow the flour to absorb the liquid from the pumpkin. You'll have a better sense of whether you need to add more flour to achieve the right moisture level in the dough, if you do that. Good luck!! ;o)