I have owned and used many tablets. My first was the Asus Transformer Pad TF300T. I fell in love with it watching the promo video. It's a convertible running Android and truth be told I rarely used it without the attachable keyboard (too heavy and awkward to use otherwise) unless I was playing certain games on it or reading e-books. My friends loved it too because the screen was relatively big and we could play fun multiplayer games. I also sometimes brought it with me at school to take notes at a class where the teacher would speak way too fast for me to be able to take handwritten notes. It started as kind of a joke/dare. I told the teacher she should speak more slowly because we don't have time to take notes and she replied "then you just write too slowly" to which I replied "well, I type really fast though; if I only I were allowed to bring my laptop" and she said "ok, bring it if you think you'll be able to take notes then." And that's exactly what I did. During breaks, my friends and I played games on it too. The battery was great and unlike a laptop, the tablet was always on and didn't make any noise. Eventually it became too slow and old to use. I still have it. It's running a custom Marshmallow ROM (it shipped with Honeycomb :) )
Then the Galaxy Note 8.0. That was my favorite device until I got the iPad Pro 2017 a few months ago. It's because I used it to draw though. It was small enough to take with me everywhere and hold it comfortably with one hand (using the other hand to draw.) I made some great pieces on it and took lots of notes with screenshots and stuff, to study other people's art. The OS was well optimized for that kind of thing.
Then I got the iPad Pro like I mentioned above and now that is my favorite device. I love tablets. I prefer small phones because I have small hands (ironically I have a Galaxy Note 9 because it allows me to draw on the go) so tablets used to have a big advantage over my phones. Even now that phones are larger, it's still way easier and more productive to draw on a large screen. I'm not sure I'd like tablets that much if I didn't draw. I know they'd still be great for watching videos and reading e-books. Battery life is a big plus when compared to "real" computers too and they are just very convenient to use all the time as long as you aren't trying to do something too advanced.