Firstly- I've been to Thailand in June/July and the weather was fine, no problems at all.
I'm currently in the last week of a four month trip through Asia. This has been my journey.
India 3.5 weeks- Start in Mumbai, down west coast, up the east. Verdict, good food if you like curry (but nothing like curry in the UK), rubbish everywhere, loads of people everywhere, it takes ages to get anywhere but the trains are great, the roads are a death trap and the people are amazing. Go if you want an adventure, don't go for a holiday. I'd go again, maybe, the mountains in the north would be the draw.
Andaman Islands 2 weeks- Spent most of my time on Havelock Island. Verdict- It's India on an Island (well it's part of India after all, despite being nearer Thailand), it's beautiful and the sea is blue but there are nicer beachs and it's hard to get there. I wouldn't go again.
Sri Lanka 3 weeks- Started in the hill country in the middle, stunning. Then worked my way down to the quieter south coast beaches. Verdict, it's a lot like India, the travel is really poor, the trains are bad and the buses are shocking. The hills are the most beautiful I've seen. The food is bad, like really bad Indian (that I love). The people are nothing to speak of. I was expecting a lot from the beaches and got very little, with the expectation of Marissa. I wouldn't go again, there are more beautiful beaches and I've seen the hill country now.
Thialand 4 weeks- Started on the south west coast islands then across to the east coast islands, up to Bangkok then on to Chang Mai. Thailand gets a lot of good and bad press, and I agree with some of it. LOTS of people come to Thailand, most of them for good reason, some of them for the wrong reasons. I like to think I go for the right reasons, because of that I avoid certain places (some of them already mentioned in this thread), if you want an imo of anywhere in Thailand just ask. You need to ask yourself why so many people go to Thailand though (and at the same time why so many people don't go to other places), it is truly stunning (in the most part). Verdict, i've been there three times now and it's the only place I've ever been that I spend the whole journey home wondering when I'll next be back. I love the place. I've spent almost three months there in total so I know where to go and where not to go, that's really helpful. I've never seen more beautiful beaches and there's a beach for everyone... literally, I've stayed on islands where I got a beach to myself. Bangkok is also my favourite city in the world, outside of the UK. Chang Mai was nice, it's cheap and we went on a nice three day walk in the hills, compared to the beaches though (and other places I've been) it's nothing special. Travelling is easy in Thailand. You're also guaranteed to see more white people than Asians, even the deserted islands only have guest houses on so no chance of seeing any "locals".
Laos 2 weeks- Crossed the boarder from Thailand, stayed north then went down to Luang Prabang then to Vang Vieng and a few other places. This is the furthest place I've ever been away from home, it's worse than Africa. People here, outside of Luang Prabang and the capital, live in huts, farm and eat what they've grown. Verdict- the transport will kill you, and trust me you don't want to be hurt here, just finding help would take you weeks. The roads are dangerous (and there's no trains) and they can't drive. The food is really bad and there's not really much to do that you couldn't do in north Thailand. I won't be going back in a hurry. I planned to go to Vietnam by road but decided it best to spend £100 on a flight.
Vietnam 2 weeks- Start in Hanoi and work my way down to Saigon. There's two Vietnam's, the one the tourists see and the one the people live in, now most places are like that it's really apparent here. Hanoi was nice and Hoi An is a nice old town. However most of the beach towns/city's are large and full of high rise hotel, not really my cup of tea. Verdict, it's nice but there only really seems to be one tourist trial that could really be anywhere in the world. I might come back, not really that much hurry though.
Background- I'm 27 and am travelling with my gf. We've stayed in a mix of accommodation (sharing the bill helps), ranging from £5 per night (£2.50 each) to £25 for the odd night. Mostly though around £10, that'll get you somewhere nice. We eat mainly at restaurants (nothing posh) with the odd bit of street food thrown in. Over the 4 months I've spent around £2500 excluding flights... about £20 a day, ranging from about £10 in India and £30 in Thailand. It's important to add that just because I say I won't go back it doesn't mean I didn't like the place.
My girlfriend has a travel blog, check it out for pics of out trip so far...
www.wherethewindblowsnow.com
Any questions please ask, I know doing research can be hard.