re: How to make grilled jalepeno poppers better?

add a shrimp to each one

I know I'm repeating but this is what I've found works well for me.

Mix a quality meat into the cream cheese. I've gotten to where I use my own breakfast sausage. Its a modified version of this.
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Season the cream cheese

I also like to grate a decent amount of sharp white cheddar cheese.

Basting them with some sort of sauce can also add different dimensions, based on what you use.

A little fresh herb chopped and mixed in can go a long way.

Jalapeno poppers are one of my favorite foods and I tweak the recipe all the time. Two of my favorites:

1. Seed and half blanch jalapenos. Mix cream cheese, mayhaw jelly, and shredded cheddar cheese and stuff each pepper. Wrap in thick cut bacon.

2. Take your favorite smoked pork sausage, cut into 6" sections, then quarter those sections long-ways (so you're left with four 6" quarters for each piece). Brown sausage "spears" in skillet. Remove when done. Seed and halve peppers. Place halved peppers in skillet with sausage fat and par-cook. Stuff pepper with cream cheese, one sausage spear, and wrap in bacon.

I almost always cook in the oven in a glass baking dish. I can control the heat better and I don't loose all my cream cheese like you normally do on the grill. Also, pre-cooking the peppers is really important because cooking them breaks down the pepper and turns it sweet. If you make poppers with a raw pepper, it will be crunch and way too hot to enjoy.