I owned an iPad 2 initially, but didn't enjoy using it much. Then when Mini came in, I bought it and enjoyed using it because I can bring it everywhere with me. Before the launching of retina mini, I sold it in anticipation.
Then iPad Air was announced. I was tempted, and bought it instead of rMini on the first day. Because of the longer-than-usual holiday return window, yesterday, I returned the Air for a rMini because the Mini just feels right at your hand, and Air, while much smaller compared to previous iterations, is still a bit too big for me. It is still great for watching movies and readings pdfs, but Mini just feels right.