Is moving to the US still worth it? I hear and read a lot of bad things about the US, but I can't say how much of that is sensationalized versus real issues.
I'm 26 years old, single, and I'm thinking that now would be the best time to see something else outside of Europe before I get the urge to settle down. Given that it is increasingly hard to receive a visa to the US, I also feel like I should take advantage of having the opportunity to transfer within my company. On the other hand, it would be a shame if I didn't like it in the US and had to "waste" some years of my youth while being separated from friends and family. Having only 10 days of paid time off seems scary to me -- the least I've ever had was five weeks.
The main things that you have to watch out is the loneliness, you are basically leaving your social circles and family behind.
About that: I’m delighted to still be living in Germany and to be with my husband, but had my American-centric brain fully taken in that he had no interest in living in the US despite having enjoyed his master’s program at Wisconsin, I possibly wouldn’t have gotten seriously involved with him.
Make sure anyone you date more than casually understands your true level of interest in remaining in the US long-term, and earlier in the relationship than you’d think it would make sense.
Financial: your worldwide investments may be taxable while you’re a US resident, and the way non-US mutual funds are taxed is a nightmare. If you have any, you may want to look into selling them before moving. You will then want to consider selling your US-based funds before moving back, depending on how your home country taxes them. Ask a tax advisor based in the country you’re moving to for advice, though.
If you can get a green card, you can work for whoever will have you, and there's no law that says you can't have more than 10 days paid leave. You can have whatever you can persuade an employer to give you.
As far as what it's like here goes, material things are generally more accessible than in most EU countries, if you have a good job. There's a lot more space over here than in the EU. In fact the US is basically empty. On the other hand, the food is terrible and there's no old stuff.
Honestly though, no one can tell you if you'll like it, even if you were to say where you'd live, which you haven't. There's a lot of very different kinds of places you could live over here!
I think you have to consider the reasons for doing such a move. Why are you specifically looking to go to the US? What are expecting to get out of it in 2, 5 years time? Why not move somewhere else in Europe?
I even toyed with the idea of moving permanently to the US myself at one time. However, 'quality of life' arguments for and against, as well as relationship issues, stopped that.
Personally speaking, my experience says that the EU is a nicer place to live. However, YMMV.
Having had a child in Denmark, I really have no fucking clue how Americans handle it.