Quantum because you get a butt load of caps from doing it.

But starcore gives you a nice suit of XO-1 so that one's great too.

Uh all?

Star cap was the least annoying and most fun. Just the best integrated.

Star cores. I like collecting power armor, and the Quantum X-01 is one of the most unique and nice looking.

I liked star cap collecting because it was quick and non-intrusive. I didn’t even notice I had 50 caps

Star cap. Who doesn’t like a Tootsie Pop reference turned side quest?

I liked all three. The star caps weren’t too intrusive and the quest itself was fun, Quantum collecting is practically a time-honored tradition, and collecting all the starcores was very satisfying.

Star core and Quantum were nice, pretty challenging for me. Star cap though was disappointing. Doing a quest to get a reward meant for people before the war just never seems worth it.

I preferred the quantum collection, pew pew didn't feel worth all the star caps, and the star cores are way to hard to find