Same. I transferred a few of the phone numbers I "collected" while traveling to Twilio, and have them all forward calls & SMS to my current "real" number.
I'd love to have a mobile app such as Burner's [0] to do messaging and outbound calls. Right now, when I do outbound SMS or calls, my real/current number appears, which adds a bit to the confusion on the other side. To make international calls, I use the mobile Google Hangouts app.
Burner is great, albeit more expensive than "raw" Twilio, of course. An official Twilio consumer app would be fantastic (but they're probably not interested to support this..?), otherwise an app that I can authorize to manage by Twilio account via OAuth would be great as well...