my experiences for bad:
pollution: caused by diesel buses, solid pollution in bus terminals or train stations, algae growing water in pools or ponds in a few parks, smog air, spitting in streets you see a lot...
yes, traffic disorders
and touts, lots of them following you, offering hotels, bars... sometimes feel not good
But there are good things, many...
impressive and different cultures, very elegant gardens, marvelous towns, historic relics for thousands of years, authentic and fabulous foods, very reasonable prices for almost everything and cabbies,
better with a friend who can speak local language when traveling
bad or good you judge: you have to learn how to make your purchases when you travel. don't always pay what touts ask, their goods or gifts might not worth that much, or ask your friends first then buy.