Watch Rahxephon. It's one of the most acclaimed anime series of the past decade. A lot of critics have hailed it as "Neon Genesis done right." I haven't seen NGE though. Either way, I'd suggest watching Rah first since it's shorter and then move on to NGE.
I haven't watched too many animes but I liked Code Geass a lot, but Neon Genesis Evangelion is just awful, don't watch it
Here's three reasons
1) Worst protagonist out of anything I've ever watched
2) Worst ending in the history of endings (they ran out of budget)
3) The show tries to bombard you with shallow religious symbolism to cover up its less than mediocre story
You are going to get biased results in these kinds of threads, just like if you make a thread "is the Office worth watching?" you're going to get people responding who like the Office...