wear whatever's more comfortable. I have 3 pairs of aldens, 2 on the barrie last and one on a sleeker last. with the former I wear casual socks (dress socks are too loose) and with the latter I can wear only dress socks. there's no hard and fast rule..
on that note, if anyone is looking to unload alden boots in 11d on a non-barrie / trubalance last get at me