My first entry into the digital phone market was a Nokia 9000 (like a micro laptop with a REAL keyboard). Using its auxilliary functions, alarms, appointments, etc. was extremely easy and required no reference to the user manual. Except that batteries are no longer available for it, I would still be using it.
When I had to replace it, I purchased a cheap Huawei, full touch screen, but found that the touch keys were way too small so I used the upgrade in 7 days option to buy something physically larger (U8230). The only reason I deliberate chose a full size touch screen was to keep the dirt out of buttons.
The auto-rotate into landscape so that I can TXT with larger keys ONLY works with TXTing, not data-entry and I very quickly turned off auto-correct and predictive text because I rarely want to enter words with sexual connotations (shows where the programmers are thinking, doesn't it?).
I have seen many people using their phone as facebook and eBay tablets, and I simply couldn't be bothered. If I want to enter serious text (like this post), it can wait until I get home to a decent keyboard and screen.
I am currently looking into a "Phablet", because if I'm going to lug something around for 'net use, I want phone capability as well. There are some nice Android units out there, but I'm in no rush.
I still await a manufacturer to blast this market open by crossing a Phablet with a Kindle -- ePaper is now capable of sixteen colors, as the greatest use I would have for a larger screen would be reading, and if I'm not wasting battery power on video the slower screen refresh is not a problem and, again, photos can wait until I get home to a real computer.
Also, because of XP-bleed, I am upgrading machines to both Win7 and Win8.1 and naturally the Win8.1 machine is multi-touch. The choice of a proper multi-touch screen, is because I have encountered significant mouse problems when it comes to accessing gesture-based functions. Of course, I will still have to connect mouse and keyboard for serious data usage!
The best use I see for a tablet is in-travel entertainment. At the moment, I'm quite happy with an MP3 player hardware to a D-Cell instead of having change AAAs every couple of hours. Visit instructables.com and lookup Treknology!
If there were a Phablet released tomorrow that allowed full video playback for 24-hours (without needing a an over-the-shoulder battery pack), I would give it serious consideration but, for a standard cell phone, I'll be sticking with my existing Huawei until the replacement batteries dictate that it requires replacement.