200 Songs!!!??. Seems a tad excessive. Our set lists (and sadly they haven't changed that much in 3 years) constitute no more than 100 songs - with the jam night stuff I do I could add maybe another 50 which I most definately blag.
Ok, I'd stick to generic rock and roll and blues to make up the numbers in your case, you can basically play what you like to a lot of this (assuming you stay in the basic chord pattern) and no one will know any different. Most people don't notice the bass anyhow unless it's a well known line (e.g. Money, The Chain etc).
Good luck with it, but as with the responses above - if it aint fun then bin it, it really isn't worth the hassle and may put you off music for life.