Barbecue
Pizza
Giorgios Pizza
1018 broadway st, just east of the nts tower. this place has some of the best pizza and calzones in town. the food is terrific, and the service is great, as you will be greeted as "my friend" even though george has never met you. please note that this restaurant is only open from 10am-6pm on weekdays. it is home to the texas-sized pizza which is the largest pizza in the city.
Homestyle
Bash Riprocks
(http://www.bashriprocks.com/), 2419 main st, is a longtime mainstay of lubbock's night life, offering excellent old-fashioned burgers and fries as well as an extensive list of domestic and imported beers. live music is also featured on the weekends.
Mexican/tex-mex
Abuelo's
82nd and quaker - the original location of a hugely successful restaurant that serves delicious tex-mex. expect a wait for tables on most nights. great standard fare of enchiladas, tamales, tacos - but also some interesting and delicious gourmet specialties such as grilled shrimp wrapped in bacon, etc. also, highly recommended sangria swirl margaritas!
Thai
Choochai Thai
2330 19th street, just east of university. this is arguably the best thai food in the panhandle, but be warned-- if you like your food spicy, stick with the mild or medium varieties. ordering your meal "spicy" or "extra spicy" is not for the faint of heart or stomach. the cook is usually very good about making sure that you really want it the way you order it.