Used to be a Ernie Ball and D´addario user too. Both are good but they don´t seem to last very long IMO. Now I´m using GHS Boomers, great tone, nice feel and lasts very long. I´ve tried Elixir strings for electrics. They last darn long, but its very pricey and I don´t think its worth it paying the xtra money for the xtra lasting effect. I´m using 09s on one of my electrics and 10s on the other. The 09s are great for solos, shredding etc and the 10s are great for blues, jazz, great sustain.
As for acoustics, I used to use D´addarios, and they still work fine for me I guess, except for the occasional treat, I´ll get a Martin or Elixir, again, its up to personal preference whether you think paying the xtra $$ is worth it when u get the Elixirs. Yes, Best strings out there, most lastings, but comes with a hefty (for strings la..) price.
I recently tried DR strings and I was definately amazed by its tone. Its handwound strings (i presume?). I haven´t really committed to the brand though, I tried the Black coated strings on my guitar and when I gigged last months, everyone thought there were no strings on my guitar, like... floating of the fingerboard kinda thing... pretty cool...