Allison, I think Aiden/Aidan is lovely and what's great about names is we each get to pick what we'll use so don't feel like you need to justify it or take a "bash" personally. For me, it's not so much the popularity of Aidan, but in combination with the popularty of names like Brayden, Jaden, Hayden, Caden, etc. that keeps it off my list but obviously its a sound that rings nicely to a lot of peoples ears so take comfort in the fact that a lot of people will be in the same boat as you. We have received so many comments about our first son's name, people either love it or hate it and they feel no problem expressing that, even my in-laws who also can never remember his full name either so just consider this a good prep for life with babe 
We have still have a very long list, some of them are: Henry, Finn (Finnegan and Finlay as well), Tavish, Owen, Rowan (Roan and Ronan, too), Shepherd, Angus, Mackenzie, Colm, Hamish, Walker, and Liam; and Esmé, Clementine, Lily, Violet, Poppy, Ruby, Carys, Finley, Rowan, Piper, Scarlett, Carys, Neve, Marlowe, Reese, Romy, Adelaide, and Liv. Our biggest problem is that for the most part we like the same names, so very few get the nice quick elimination that most couples go through with the exception of my one guilty pleasure - Aquinnah :)
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