I used to carry my iPad around but as my phone got bigger (HTC Amaze at 4.3" to Note 4 at 5.7"), tablet use went down as phone use went up. About 6 weeks ago, however, I replaced my laptop with a Surface Pro 3, so tablet use has gone back up, though I use it with the keyboard attached 95% of the time.

EDIT: my iPad 1 is now a monitor for our security cameras at home...it is more stable than the android version And has gone for a solid year without crashing. The android one crashes a few times a day.