I agree....

A few simple ingredients allow the creation (easily) of dressings far better than can be bought "Bottled", expensive or cheaply.

Per Peeve....the use of soybean oil (which lasts forever and tastes like it has) in almost every bottled dressing. If you can't use good olive oil (and personally I like a couple of the "deeply flavored" - read strong - Spanish brands), try some of the oils from (or in last gasp, flavorless rapeseed/canola).

Nastiest habit of 'Merkin and Scuppered H'aislians, the addition of sugar to salad dressings and sauces, including the clearly indefensible addition of sugar to "steak" and "barbecue" sauce.