Lagavulin, Laphroaig, and Caol Ila (and, of course, several others) are all Islay malts. Islay is in the southern Hebrides, so I suppose that qualifies as lowland, although scotch from there is nothing like lowlands from the mainland. I don't care too much for highland scotch. Too subtle. When I drink scotch, I want to know that I'm drinking.
I love that smoky, peaty flavor found in the Islay malts. Talisker is from the Isle of Skye, and is very similar. One noteable exception is The Balvenie, which is a highland from Speyside. The honey is amazing. Very different from most of the highlands I've 'ad.
And yes, the only time I've had JW Blue is when someone offered it to me for nuttin'. Meh, but it is free, so enjoy!