So I'm wondering if my signature is okay, I'm linking to main domain and one page with different keywords obviously and I'm doing same on several websites. Is it fine? or should I rather have one link with one keyword?
no I'm sneaky. I have a strategy, on high PR sites I only link with main keyword. On the small PR sites I use long end keywords strategy is always important!
IMO. there's nothing wrong to have more BL on one page. and in usual at the main page.. i think it's depend on your target KW.
your targeting and competing your kw.. theres nothing wrong with that... as long as you don't do some spamming...