Which groups of people tended to be loyalists, or British sympathizers, during the American Revolution?

Quakers, many Germans (because of the German connection of
the House of Hanover to which George III belonged(although ethnic Germans fought on both
sides of the revolution), recent Scotish immigrants tended to be Loyalists, as opposed
to earlier Scots and Scots-irish immigrants who tended to be rebels (Presbyterian
churches were often targeted by the British), more Blacks seeking freedom from slavery
joined the Loyalist cause than the Patriot cause, there was strong Loyalist sentiments
in southern colonies such as North and South Carolina and strong loyalist sentiment in
parts of New York , New Jersey and Pennsylvania.

Perhaps as
many as 20% of the population were active loyalists.  Vicious civil war existed between
Loyalist and Patriot partisans in North and South Carolina the fighting continuing after
Yorktown until peace in 1783.  This involved the torture, rape, murder and robbery of
civilians by partisans of both sides.

People switched sides
during the war, and a large segment of the population wanted to stay out of the struggle
as much as they could.  Some captured British soldiers joined the Rebels, while some
captured rebels joined the Loyalist cause to avoid or get out of the horrible prison
ships.  The various fortunes of the Rebels and British forces in the war effected the
loyalties, which is typical of civil wars.