A lot of character creation focuses on coming up with aspects — some are called High Concept, some are called Trouble, but they basically all work the same way. Aspects are one of the most important parts of your character, since they define who she is, and they provide ways for you to generate fate points and to spend those fate points on bonuses. If you have time, you really might want to read the whole chapter we have dedicated to aspects before you go through the process of character creation.
Aspects which don’t help you tell a good story (by giving you success when you need it and by drawing you into danger and action when the story needs it) aren’t doing their job. The aspects which push you into conflict — and help you excel once you’re there — will be among your best and most-used.
Aspects need to be both useful and dangerous—allowing you to help shape the story and generating lots of fate points—and they should never be boring. The best aspect suggests both ways to use it and ways it can complicate your situation. Aspects that cannot be used for either of those are likely to be dull indeed.
Bottom line: if you want to maximize the power of your aspects, maximize their interest.
When you’re told you need to come up with an aspect, you might experience brain freeze. If you feel stumped for decent ideas for aspects, there’s a big section focusing on several methods for coming up with good aspect ideas in Aspects and Fate Points.
If your character doesn’t have many connections to the other characters, talk with the group about aspects that might tie your character in with theirs.
If you ultimately can’t break the block by any means, don’t force it — leave it completely blank. You can always come back and fill out that aspect later, or let it develop during play — as with the Quick Character Creation rules.
Ultimately, it’s much better to leave an aspect slot blank than to pick one that isn’t inspiring and evocative to play. If you’re picking aspects you’re not invested in, they’ll end up being noticeable drags on your fun.