A lot of people LOVE Charles Spurgeon because he was an amazing evangelist. Some people have never thought about the theology that motivated his evangelism. Here's an interesting article, Are You Sure You Like Spurgeon?
Here's a taste: Spurgeon writes In Defence of Calvinism,
"The doctrine of justification itself, as preached by an Arminian, is nothing but the doctrine of salvation by works...[T]here is no such thing as preaching Christ and Him crucified, unless we preach what nowadays is called Calvinism. It is a nickname to call it Calvinism; Calvinism is the gospel, and nothing else.
I do not believe we can preach the gospel, if we do not preach justification by faith, without works; nor unless we preach the sovereignty of God in His dispensation of grace; nor unless we exalt the electing, unchangeable, eternal, immutable, conquering love of Jehovah; nor do I think we can preach the gospel, unless we base it upon the special and particular redemption of His elect and chosen people which Christ wrought out upon the cross; nor can I comprehend a gospel which lets saints fall away after they are called, and suffers the children of God to be burned in the fires of damnation."