Your hair does thin some but mine started curling. I look like I have a perm now.
I've never been sick from it. I get my eyes checked regularly and there's no sign of damage. It's rare for that to happen.
There are places you can buy clothing with sunscreen built in. I love the clothing they sell at coolibar.com. they're expensive but worth it. I wear their long sleeve tees and hats with jeans. It gives me time to get outside for errands. You can also buy sun-brellas there too.
As for weight gain I've actually lost 50 pounds over the last year just by diet alone.