I love T-Mobile's philosophy and how they're trying to shake up the industry. I love the device freedom. I love HD voice. I love simultaneous voice and data. I love how their HSPA+42 is as fast as LTE in a lot of places, and is the "fallback" to LTE in those places. I love how I can get a similar plan to my Verizon plan for about 60% of the cost.
I hate how I walk inside my building and lose coverage (Verizon gives me weak, but consistent LTE) - and I'm in one of their strongest areas.
I hate how when I travel to east TX to visit family, I lose service completely(even voice and text), even when the map shows I should at least be getting Edge - and this was as recent as a few months ago.
With Verizon I feel comfortable ditching my landline completely. With T-Mobile I'm nowhere near that train of thought.