Yeh I was aware of that list but it gives no information on the quality of the games, that's why I wanted to ask what people actually liked.

Thanks for the suggestions guys, I'm quite busy now but I'm checking those games out on the side and will hopefully have the opportunity soon to indulge!

The two I listed are tower defense games, so if you don't dig those you might not like them.

I have seen lots of "Left for Dead" wannabes out there over the past couple of years.
Any time a game is a big hit, expect dozens of imitations.
I hasten to add the Plants vs ZOmbies is a work of pure genius, though.....