You already know this, but same here. It's a toss up though because browsing is cheaper this way if you're going to light mobile sites (I can use 0.8 units over a couple minutes rather than 1.5-2.0 units on older TracFones), but MMS is just insanely expensive.
Castrol EDGE 5W-30 is my drug of choice.
Primary: iPhone 6 64GB, Galaxy Note 3, Galaxy Avant: 5 lines, 3x $5 Android web, 1x $2.99 T-Zones, corp discount + $10/mo loyalty discount = $93/mo tax inclusive
Secondary: Galaxy S3 LTE & iPhone 4S: TracFone (Verizon)
Mobile Broadband: HP Stream 13 w/ T-Mobile 4G & iPad Mini Retina w/ T-Mobile 4G LTE ($10/mo for 5GB with hotspot)