First of all people, as thebluerabbit said, the questions would be about Islam, and not about my believe. But I will answer your questions.
How/why did Islam make more sense to you than any other religion you'd looked at?
First of all, I believe that there is a Creator. And that there is just one Creator. Abrahamic Religions are the most logical ones, why would so many people believe in it if it wasn't? So it was Judaism, Christianity or Islam. The ideas in Judaism were different than how a Creator would "rule". The idea is like "the Jews are humans and the non-Jews are animals".
About Christianity... Christianity is actually... you know... just different. What I don't understand about Christianity is actually the most about the trinity. I didn't get any, "good" answer about the trinity.
And at last Islam. Islam is a bit different than Christianity and Judaism. Why? Because the Message is simple;
Proclaim, "He is the One and only GOD. "The Absolute GOD. "Never did He beget. Nor was He begotten. "None equals Him."(Qur'an 112:1-4)
And there is no error in Islam. Not even one. Many "miracles" etc. Things that actually wouldn't be known in that time etc. The Qur'an explains for me everthing. The reason I'm here, the reason I'm being Created and more.
According to this, you accept as true what is revealed in Old Testament (to Moses and before) and New Testament (to Jesus). Then why don't you accept Gospels?
What do you mean with, the Gospels? The life of Jesus(pbuh), or everything written in the Gospels?
1) Why do you think that Islam is true? What kind of evidence do you have?
2) What do you think about Sharia law?
3) What do you think about passages in the Quran that describe Allah as cruel?
4)What do you think about fighting against infidels (respectively infidels have to pay the jizya)?
1) Already answered
2) What do you think I need to "think" about Sharia Law. The Sharia Law in Iran, Iraq or the Sharia Law in Indonesia and Malaysia?
3) I don't see any "cruel" passage. Only warnings if you don't believe. Think about it as a school, because it's the best example I can give. Make your homework that's it. If you do, you will pas, if you don't... you won't. Simple as that.
4) I'll answer this later.
Greetings