spice tolerance

I enjoy cooking. I like knowing what is going into my body and adjusting recipes to my own preferences. Don't get me wrong, i love eating out and fast food too. BUT, if i have the time, and the ingredients, I will happily cook up a tasty meal. Lately, I have been branching out and trying different things. Actual meals, instead of just frying, grilling or baking some sort of meat and adding a side or two. I've been making various curry dishes, meatloafs, and various other asian foods like drunken noodles. Problem is, I am also impatient at times, so I will sample to figure out flavors and if I need to add or modify before the full flavor explodes... worst is when it comes to dealing with cooking with peppers, specifically jalepeno peppers. I usually misjudge in either direction, and end up with some variety of spice level I am not prepared for.