The phrase "a friendly sort" is correct and usable in written English.
It can be used to describe someone who has a friendly or amiable nature.
Example: "She is truly a friendly sort, always greeting everyone with a smile and a kind word."
Alternatives: "a pleasant person" or "a sociable type".
ISADORE WEINSTEIN, a retired businessman from Kingston, N.Y., was having a friendly sort of tiff with his wife, Ida.
He was a friendly sort and, as a writer, very supportive of his writers on the show.
Ahmed is a friendly sort who greets visitors with a glass of Scotch in one hand and offers a wet handshake with the other.
The Imperial, despite its name and imposing façade, is a friendly sort of place with few of the pretensions, such as dress codes, that still cling to life in some parts of the UK.
Visitors aren't really supposed to talk to the monks but they're a friendly sort at Pluscarden and, after mass on New Year's Day, a jovial older monk, Father Matthew, popped down to St Scholastica's to wish us well.
And being a friendly sort, she says to them: "I'd like to invite you back to my father's house for dinner". Well her father is a man-eating giant, as are the other Laestrygonians.
A less friendly sort of attention came from rights holders.
He is avuncular, a very friendly sort, who instantly puts you at ease, and tells me that he loves being able to disappear back to his three children, who are all studying Suzuki-method violin, and his wife, who sings in Brian Eno's private choir.
There's a fairly friendly sort of postcode war that goes on between the northern suburbs and southern suburbs of Canberra.
This serves as a particularly moronic progression on George Carlin's legendary Seven Words routine, which pointed out that despite being an anodyne, "friendly" sort of word, "tits" was one of the words that you absolutely could not say on American television.
Consider this as an 'environmentally friendly' sort of beverage as it was invented to recycle leftover organic scraps.
