agree with sawyer... dont try to see everything, or youll end up seing nothing (oh shit, i should be a philosopher, that was deep!)
But seriously, if you have a couple of months you should focus on a few countrys max. Or atleast one part of the world... like go to South America and start in Brazil, make your way across to Bolivia and Peru and fly home from Santiago, Chile... (I will be doing this exact trip soon, and Ill have about 2,5 months, and Ill probably spend 2 of those in Brazil and Peru)
Maybe south america isnt the best place to start if you want english speaking countries though... Im a bit worried about that myself, cause my spanish is horrible...
A couple of years ago I flew to Singapore, and then worked my way up through Malaysia, Thailand, and then through Kambodja into Vietnam. (by bus) This is a very easy part of the world to travel in... many people speak english (atleast a little) and food and hotels etc are very cheap. I really liked Vietnam... Thailand is very beautiful too, if you stay away from the biggest tourism spots (like phuket for example)... Bangkok city is a must though. Huge, noisy, dirty and chaotic city but for some reason its also a really nice place to stay for awhile.
If you want to see something new I would definetly recommend going to another part of the world... I mean, sure Berlin is nice, and there are many many many beautiful places in Europe, but youll always have those places close to home. There is nothing that stops you from visiting those places later, but you never know when you can take another 2-3 months vacation....
anywho... ill stop now... If you have any quesitions about travelling in south east asia or just travelling in general just ask and Ill try my best to answer...