We transplant a lot of stuff, partly because of our gravel soil it is very hard to germinate small seeds that are planted shallowly. I'm still trying to figure out how to grow a decent stand of carrots. Brassicas do OK, they germinate so fast they are up and rooted down before the top dries out if I'm just a little diligent about watering. Stuff I like to transplant includes beets, peas, early green beans, parsley, fennel, radicchio, belgian endive, chard, kale, cabbage, collards, peppers, tomatoes, summer squash.
We are having some problems with carrots in the wet section of our garden. Our old compost on this bed is rather on the course side (ok - big chunks), and the ground there has a lot of clay. Worked fine for transplanting leeks, but not so hot for carrots.
On a fairly late planting of carrots what we did was dig shallow trenches - fill in with very cheep forest loom from our local garden store - sprinkle seeds - and very lightly dust with more forest loom - water, the cover with plywood.
We have some germination, though I would not go so far as to say spectacular. I will have a better idea in a couple of weeks.