Eurotrip, any tips?

If anyone reading this has some useful tips on planning a European trip, please help me out.

I've started planning a trip for two. It will most likely happen in 2014. And we will be going for about 15-16 days.

• How many days should one spend per country?
• Which cities / towns / hidden places are the best to see (I can't make my mind up, there are sooo many that I love, and so many that I don't even know of yet)
• Is it a good idea to travel by train?
• Which country has the best castles?
• Which country will be best to start with, if I want to end in England?
• Is Egyptair any good? They seem cheapest.
• Any kind of info will be much appreciated, so if you have done this before, share the secrets. Especially if you are South African :)

I know that there are great traveling agencies out there. I just think with very careful planning I can organise my own trip at a much better price.


Cheerio :)

While doing some research, I found a little European country that I have never heard of before - Liechtenstein. It looks so beautiful.
So this castle is in Germany, not Liechtenstein... It's name is the Lichtenstein Castle... Apologies :) 

The Vaduz Castle, Liechtenstein