International, long haul, First Class.
With an occasional exception(i.e. 2 class airplane with Business in the front), I only use miles for long haul, First Class. If you save them up, you get way more bang for the buck.

Personally, I get mad when someone uses 25K for a domestic ticket that you can do on a advance, cheapie.

Also, I always transfer hotel points to airline miles to increase lifetime miles, more so in the case of AA, which I transfer everything to. I can usually get a cheap hotel someplace, but I, personally, have no access to First Class longhaul without the miles.

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Michael
AA PLT,1 MLN Miles+
HH GLD, SCI GLD, MM SIL
LE PRESIDENT ETERNEL DE CAMAIR-CAMEROUN AIRLINES