Hm.. it would be hard to narrow down exactly TBN is such a good forum, but I'll throw my comments into the bowl anyway.
1st, due to the vast membership, virtually every make and model of tractor is represented here.. everything from the rusty antiques and orphans, to the super high dollar industrial machines, farm and agricultural equipment, specialty hybred type machines, and a vast amount of imports.
esentially.. if you have a tractor question.. usually.. at least one or more of the members here has that tractor, has had that tractor, or knows someone who has that tractor, to go along with that... just about any type of mechaincal failure possible has happened, or has been read about by the membership here. To borrow a term from another popular website.. I tend to refer to this forum as 'Tractor-pedia' ( ref wikipedia.. web resorurce ).
Soundguy