Just speaking size-wise, I always reach for my mini instead of the big iPad. It just seems more convenient, especially for travel. I can't say I ever feel the smaller screen is restrictive. I don't feel weird carrying the mini into a restaurant, but I wouldn't do that with a big iPad. I have small secretary-type desks (the style, not the occupation) and the mini doesn't get in the way there, but the big iPad would. It's a lot more comfortable for reading/surfing in bed. BUT if I had to choose only one...I don't know. I have found that since I got the 6 Plus, both iPads spend a lot of time just sitting there.