westville will be your lifeline...burgers, salads, fish...vegetables...its all fresh and all good. delivery is solid and the place is usually packed...no reservations.
la bonbonniere is a greasy spoon on hudson that actually is a nice reprieve from the fancy places...great breakfast...
tavern on jane is in my opinion the best bar and grill in the west village...always solid...good for drinks...and their burger beats corner bistro.
elephant and castle on greenwich has great comfort food...their chicken schnitzel and chicken caesar salad rule.
good for brunch is packed and its decent.
tartine is cramped but cheap for bistro dinner.
da andrea has in my opinion the best italian for the money south of 14th street.
ino for the best panini in the city.
I'm not sure what affordable is for you but this is a start:
Grano Trattoria 21 Greenwich Ave. great friendly neighborhood place, awesome pizza
Alta 64 W. 10th St. good small plate, fun place
Gobo 401 Sixth Ave. really good vegitarian
Cafe Asean 117 W. 10th St. simple, good food, friendly, pretty cheap
Pearl Oyster Bar 18 Cornelia St. amazing lobster roll
Aki 181 W. Fourth St. small space but fresh, good, and reasonably priced
Waverly diner good diner food
Amy's bread 250 Bleecker St. good sandwiches and breads