The blessing: Lots of extra food for lightning fast city growth. Pumping out workers and settlers is easy and fast.

The curse: Early population cap due to sickness. Allot of flood plain squares will keep your capital very small. Expansionist traits can help combat this a little, but it's still hard when your capital has to stay small.

As long as there are some hills around its a blessing. I like to build cottages on the FP.

The food counteracts the unhealthyness early on, and later you can get health from other sources. Also, you get +2 if you settle next to the river, which you did.

The blessing: Lots of extra food for lightning fast city growth. Pumping out workers and settlers is easy and fast.

The curse: Early population cap due to sickness. Allot of flood plain squares will keep your capital very small. Expansionist traits can help combat this a little, but it's still hard when your capital has to stay small.

Well the extra food can counteract the extra sickness

I like to build cottages on the FP.

I think that's the best use of them, myself... you can end up with 5 or more towns in your capital pretty early on. That advanatge speaks for itself, not to mention that flood plains have one natural commerce on top of that.

Blessing, use the high pop growth to pop rush stuff all over the place in the early game. By the late game you should have lots of health givers and you can switch the city to GP central.