'Been in this city for ten odd years now!! Seems a very long time, indeed:-). Being a strict vegetarian I will give my two bit on some vegetarian restaurants in town that I've been to. For the best South Indian food, one can safely head to Saravana Bhavan or Dakshin at Park Sheraton, depending on budget:-). Really delicious stuff there. For good North Indian /South Indian combo options, Copper Point at GRT Grand Days, T. Nagar is lovely. For an amazing dining experience with outstanding food, head to Annalakshmi, Mount Road. They have some of the most common dishes cooked and served exquisitely. For some good tasty North Indian food, my favourite is Copper Chimney.
For a healthy, yet tasty food, head to Sanjeevani in Adyar or Anna Nagar. I enjoy their Rajakeeyam thali at lunch - so elaborate and grand but so easy on the stomach.
For some nice Chinese food, Wang's kitchen will not disappoint. I particularly like their dessert - fried ice cream:-). And a fine vegetarian restaurant very near home is Cream Centre. Its got quite a huge spread from Indian to Continental to Mexican and Lebanese... and their thali is elaborate too!! Available only on weekdays one should ideally skip breakfast to do justice to the food. For a regular, standard buffet spread, I find the spread at The Park & the Raintree very good and yummy.
For great sandwiches, Coffee World and Subway are good. And the best pizzas are from Smokin' Joes. For chaats, its Shree Mithai or Gangotree.
For the best desserts, head to Mocha and chocoholics have plenty to choose from. I guess I have covered most categories of veggie food. Go ahead and indulge and do add to the list!