I've used phones with slide-out keyboards before. It's not an all-or-nothing thing. A lot of the time, I will use it more or less the same way I use a portrait form-factor phone. I will even still use the on-screen keyboard for stuff that is mostly english prose.
I will switch to the keyboard for:
Complex text like time, dates, figures, or anything where a spell-checker won't help.
ssh using VX ConnectBot
games, specifically roguelikes, specifically Dungeon Crawl Stone Soup, Cataclysm: DDA, and possibly nethack as native android apps
Similar games and terminal-based applicatio