When I make aioli I use 2 olive oils: one is a bit more expensive, a bit more peppery and a bit more gutsy; and a second which is a bit more bland but still nice and mellow. By blending the flavors in this way you achieve an olive oil flavor that isn't too strong or too peppery. Aioli is great with cold roast pork. Basil aioli is good with pink grilled salmon and lemon aioli works well with crostini in fish broth.