I actually rolled my very first toon from back in the day again recently. She was an EMP/Rad Blast Defender. When the game was live and being the completest I am, I got her all the way to 50 and beyond.
I remade her as a Fire/Energy blaster here on Homecoming because as sentimental I am as she was my first character to 50, most of the time I either loved or truly hated playing her when she was an EMP Defender. Strange as it sounds, I always feel like something of a bad parent when playing her now as a Blaster.
I had the pleasure of teaming with a few EMPs of late doing Incarnate Trials and various +4x8 TFs. Was tremendous fun to have them on the team. I had forgotten just how powerful/fun Fortitude, Adrenalin Boost, Auras etc. can be when you're buffed by them.
Soon as I finish my Street Justice/SR scrapper alt, she'll be my next project.