No. Primarily due to working on other characters although I got the one T3ed. I also need to work on builds, and End Mod heavy builds for slotting come across as less exciting due to the bonuses they get. The Defender is 28, and I'm still going, "Yeah, I have no plan for this." I think a safe pick is to go Defender because blasting and getting the Shock aspect is easier to see and understand. Elec control is a bit more wonky. Its main fast recharging AoE is a sleep, and two other powers chain so it is far more subtle.
You pick a Sentinel if your primary thing is End Drain, you care less about support, and to be frank, you get an armor. I have a level 50 Sent who I will continue to play around with, but I just don't find the AT all that engaging.