Well think back to 80s it was all Nikon F3s, then the Canon EOS 650 & 620 came out in 1987 I had the 620 with a 35-70mm it was the future!
Canon won the market over when it developed the EOS mount while Nikon bodged an electronic version of the F mount. It was a brave decision by Canon to drop the FD mount and start from scratch and it proved to be a better option in the long run. Nikon have refined their "bodged" F mount and now there is no real difference (as far as I know).
It's always swinging between the 2. One of them does something good, the other improves. Be grateful as it keeps development being pushed forwards. 64 point AF system anyone?!
on a side note...
when canon developed the EOS system they also introduced a series of lenses to compliment them. the lenses that were introduced to go with the new EOS cameras were made exceptionally good quality for their time but with a reasonable price tag to entice the buying public to buy canon
it was literaly a success or bust situation for canon so they couldn't afford to fail having just made every canon FD lens and their owners redundant to future purchases
so... what this means is if you can find any of the original series of the canon EF lenses they tend to sell for not a lot of money and you get yourself a nice lens accordingly
not as good as L glass granted but usually better than anything that you could buy at the same price