I've been using a Mac full time for a little over a year. I'd agree fully with you on the full screen going to a separate desktop. Extremely annoying.

However, you can switch desktops with control + right/left arrow. No need for the trackpad.

Because I'm easily distracted, I frequently have all major applications maximized. That's how I always used Windows. Fortunately, I can have the same on the Mac. Maximized with the dock showing below and all apps on the same desktop. Full screen is a rarity for me.