I think Spain is probably your best bet, and you can probably get there on a reasonably priced flight with a change in Dubai or Abu Dhabi. The winter weather is decent and the big cities are always packed with locals rather than so many tourists. Barcelona is probably more fun than Madrid, though both are big cities with a lot to see and notoriously good nightlife. If you get a cheap enough flight I don’t think you need to do a package. It’s pretty easy to get around Spain’s big cities just on English, as long as you do a bit of research. In 5 days you could spend 3 days in Barcelona and then 2 days in Madrid, or just 5 days in the Barcelona area. It’s a big city with plenty to see and some good day trips. You could also go to Valencia, which is also really fun and a short train ride away.
If you’re a fan of cheese, this place is really fun. It’s a quaint little shop that’s right across the street from Pike’s Place Market. With hundreds of competitive awards under their belt over the last decade, you know their cheese is going to be good – and they do too. They let you sample different varieties of cheese before you buy it, so you know exactly what you’re getting into.
If it’s not on there already, a visit to Iceland should be added to your bucket list. November will be chilly, but you’ll miss the high season crowds and arrive during peak viewing season for the Northern Lights (November through March) when the nights are longest. The infusion of colors, mostly bright green and at times a mix of purple, pink and red, is a breathtaking sight. November is prime time to visit the gorgeous ice caves, crystal and sparkling in stunning shades of blue with cave tour options that include hiking or snowmobiling.
If you have a flexible schedule, or if you just happen to have some time off in November, you are in luck. This is honestly the best month of the year for finding cheap destinations that also have fantastic weather. Since most people don't start their winter travel until mid or late December, it means crowds are small and hotel prices are low through huge sections of the travel world. Those wondering where to go on holiday in November have many great choices at bargain prices, although airfare may cost a bit.
One reason that Vietnam isn’t as popular as it could be is that travelers often feel a bit hounded when they are there. For some reason, those in the travel business in Vietnam (working at travel agencies where you book tours and such) make tourists feel like they are being hustled. They are rarely 100% honest with what they tell you or about the prices they are charging. Still, it’s an amazing country and it’s also incredibly cheap, even if you end up paying a bit more than you were supposed to. I highly recommend it, and it won’t be a problem if you realize before you get there that you can’t take everything at face value in the way that you usually can in Thailand or Bali. Quality of hotels for the money is also very good.
As for your Europe trip, I highly recommend spending 3 nights in any city you visit. If you change cities every day or every other day you’ll end up spending most of your holiday on trains or in airports rather than seeing the places you flew all that way to see. So if Amsterdam and Barcelona are musts, I would add exactly one other city if you’ve only got 9 days. Unfortunately it’s not on your list, but the best and easiest one to add between them is Paris. There is a train from Amsterdam to Paris in a bit over 3 hours, and another high-speed train to Barcelona from Paris in 6 hours 27 minutes with no changes. Paris is easily one of the most impressive European cities for tourists, but if you’ve been there before and don’t want to go again you can obviously choose something else.
If you’re a bit more on the timid side, you can always use Yelp and TripAdvisor to get good insights on places people have visited. As a disclaimer, some of the ratings may not be accurate on these sites, so make sure you go through and read some of the more recent reviews that people have written. We did this for a few of the places we visited and had no issues.