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I'd say your choice of art supplies might be dictated by what you want to do with your art.
I'll confess that as a result of an old experience, I have a big bug up my ass regarding light fastness. If you're making art as a hobby, or art to be reproduced, screw it, go with markers (I just bought a bunch- with the idea of maybe reproducing something made with markers for collage), but, markers are not light fast. You can spray them with UV fixative or frame it behind UV protective glass, but that retards fading, it doesn't prevent it.
Color pencils on the other hand, are relatively light fast (except, as I recall, neon colors- you might want to research that).
That gel pen...the ink will eventually do weird stuff...if you're using the white for highlights...you might want to reconsider & go with gouache...