"All builds are good" is great advice and also terrible advice. A lot of builds can be very challenging for new players. My first toon was a trick arrow/archery defender, just like someone else mentioned, and you know what? I followed that up with an illusion/empathy troller. Only a teenaged contrarian desire to intentionally run a suboptimal build and make it work kept me going. I don't have that drive now; I would call that bad design and quit. First time I rolled a blaster I thought I was playing an entirely different game.
Yes, all builds are beautiful for reasons - I'm sure even an illusion/forcefield controller can somehow be made to work, though hell if I know how - but it's not practical advice to give to someone who would be asking such a question. Like, I'm sorry to join this dogpile, and I get the message behind it, but I'll echo sentiments from other posters here that it's a statement that can only be made from someone who already has system mastery.
Or already has a fire/kin at 50. :)