The only ones I've read were forced on my by school :
5. BRAVE NEW WORLD by Aldous Huxley
I quite enjoyed this - not a bad book to study at school
85. LORD JIM by Joseph Conrad
I wanted to poke hot needles in my eye rather than read this, but forced myself (given it was my last year of high school). Conrad (from what I remember) has a propensity to use 10 words when 1 will do. He ends up with sentences that take up half a page and you have to re-read several times to understand wtf he is saying. I would rather die a slow and painful death than have to read this again (22 years later).
edit: btw I read quite a lot, but obviously nothing that can be termed a 'classic'
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The other thread - I've read 30 of the 200. It is much more a 'popular' list and contains a lot more modern literature. Having said that it obviously contains things I'll never read - a lot of Pratchett, who I just don't enjoy reading...