The phrase "a serious type" is correct and usable in written English.
It can be used to describe someone who has a serious demeanor or personality, often in contrast to someone who is more lighthearted or carefree.
Example: "In our group, Sarah is definitely a serious type; she always approaches discussions with a level of gravity that keeps us focused."
Alternatives: "a serious person" or "a serious individual".
I'm not really a serious type of person.
Earlier, Cameron's former strategy adviser, Steve Hilton, said the resignation honours list revealed a "serious type of very British corruption".
"He was a serious type," she noted, "who seemed content to be on the periphery, simply observing".
I knew that when I got into folk music, it was more of a serious type thing.
Similarly, a 2012 Korean study reported that traumatic head injuries was a serious type of physical abuse of boys 0 4 year of age (Kim et al., 2012).
Primary cutaneous melanoma is a serious type of skin malignancy and accounts for the majority of skin cancer deaths.
Here we report a serious case of disseminated type mucormycosis caused by Rhizopus oryzae in a patient suffering diabetes with orbital cellulitis, which is a rare clinical case.
"He would put on that little baby whine and look up at you and ask for something, something he shouldn't have, and I'd always say, 'O.K., fine, go ahead, little Keith, go ahead.' " Also killed was Carnell Dawson Jr., 10, a self-proclaimed expert in back-flips; Juan Ortiz, 12, a more serious type; and LaWanda Dawson, 14, who dressed like her mother in bandanas and flannels.
They are likely experiencing a very serious type of seizure called status epilepticus, which is a symptom of epilepsy.
A more serious type of drama, developed by Alexandre Dumas fils, was the problem play (sometimes called a thesis play), in which social problems were debated.
A more serious type of altitude sickness, high altitude pulmonary edema (HAPE), occurs rarely among newcomers to altitude but more often affects those who have already become acclimated to high elevations and are returning after several days at sea level.
