I have a hard time feeling anger, except at targets like bad drivers and politics. LoL.
Seriously, though, my go to emotion when I'm struggling is despair, self-pity, isolation, suicidal thinking. Also a long history of doing that--not a whole lot of other options.
It's frustrating. Been especially tough lately, because my three friends who I opened up to the most have all gotten busy with other things---two have found new relationships and I no longer exist. My other dearest friend who was a real support (it went both ways, too) has gotten a job, and her relationship is improved, so she has no time for me either.
Of course I feel sorry for myself! Once you get wired a certain way, it's really hard to re-route.