Most common location for chronic gastric ulcer:
Ref. API Textbook of Medicine. Pg. 812
 
Most common site -lesser curve near incisura angularis .

Duodenal ulcer -Most common site -1st part of duodenum (overall most common site for peptic ulcer)
Most common complication of peptic ulcer is gastrointestinal bleeding because of the erosions of gastroduodenal artery.
Pylorus of stomach
Lesser curve near proximal stomach
Lesser curve near incisura
Greater curvature