Island-hopping is an essential part of the Argyll experience and good ferry links (and air links to Islay & Tiree) give plenty of tour permutations.
Bute in the Clyde estuary has the air of a traditional resort, at least in Rothesay, though Mount Stuart is a spectacular attraction here.
Beyond Kintyre, Islay and Jura have a truer Hebridean feel: Islay busy with whisky distilling, Jura remote, rugged and empty.
Time the ferries right and you can take in Islay along with Colonsay, a perfect Hebridean gem. Coll and Tiree are further out, with their machair and beaches, white crofts and – perhaps surprisingly – impressive sunshine records!
More easily accessible are the mountainous Isle of Mull and low lying Iona, a place of pilgrimage for almost 150 years.