There you could enjoy everything that you want, it has lots of beaches, nice cities, cool nightlife, you will need less budget than for example if you choose France, you also could visit Galapagos island which is an emblematic place around the world.
However, it depends on what do you want to do, I am certainly sure that all those places have a lot of fun activities to do, but you need to start asking yourself what do you want, a hot weather or a cool one? I just recommend you to visit Ecuador because I love it and I know that you will have a great time there.
Brazil
Austria
I would say either ecuador or australia they are the most economical tourist sites and u can enjoy a lot. Especially ecuador best beaches in the world. U can also go the galápagos island In ecuador
France :)
