MechaPilot
Explorer
I've heard that 4e is pretty good, but I want some more opinions before I start playing.
4e is my favorite edition of D&D (followed by 5e then AD&D 2e). So, naturally, I'd recommend it. I do agree with other posters that people should try most editions of D&D. I've played BECMI, AD&D 2e, 3e, 4e and 5e; each one has their own quirks and foibles that contribute to creating a different play experience. This means each one excels at certain things and comparatively falls behind in others.
4e has, to my experience, been the easiest edition to DM. The combat is dynamic, the characters feel like heroes straight out of the gate (but are still very much at risk if they charge in recklessly; don't let the higher HP totals fool you), the overnight full-healing reduces the amount of time the PCs spend recovering from combat and increases the amount of time they can spend adventuring, the at-will abilities means your characters always have something heroic and class-themed they can do (no wizards relying on crossbows because they have no at-will spells), and the roles are a great way to illustrate what a class' specialty is at a glance.