As a BrE. speaker, there are come constructions using verbs in their present continuous form which just sound wrong. The best example being, "I am loving Stack Exchange."
After reading around the internet, all the information I can find seems to be addressing the difference in usage and meaning between -ing and infinitives such as "he went on to sing the National Anthem" and "he went on singing..."
Is there a rule as to which verbs can or should be used in a continuous form "I am drinking tea" and those which shouldn't, "I am loving this tea so much right now*"
*In a thick Californian accent!