It ain't the call as much as it is the caller.
You need to be able to get inside a turkey's head and paint pictures. That's a tall order, but it comes with an easy suggestion as to how to go about doing it: get out and listen to turkeys. They are the best teachers. Once you have what they are saying and how they are saying it stuck in your head, the call choice will be much easier. You will have the sound you want to make in your head, and from that you will be able to express yourself on the call.
Starting out, I was much too worried about the call and matching my calling to what it could do. Now I am more worried about the call in my head and bringing what's there out with the call. Once you start listening to what's in your head, the call choice will be much easier.
Having said all that, I will now turn around and say it is hard to pick what call is going to get a turkey going on a given day. Some guys take the kitchen sink with them and get weighed down with what's in their vests. I deliberately don't take a vest and just carry. . . well, let's be honest: it's a purse. The point is it limits my choices.
Why? Because I don't want to throw everything at a gobbler in one day looking for what he's going to respond to. I make a few solid choices before I go out and that's going to be it. If I strike out, I can go in for coffee and change calls. I don't want to throw my 'A' game at him, then go to my 'B' game and so on, showing him everything I got.
What do I take? I take one box. I take 2 pot calls. I take a push-pin call as a last resort and I take a hand full of mouth calls. I'm also pretty fair just calling with my own voice.
If you are just starting out, I would recommend:
Box: Heirloom Dixie Darlin'. I was going to say Quaker Boy Grand Ol' Master, but they don't make it anymore.
Push-Pin: Quaker Boy Easy Yelper
Mouth: Wing Supply usually has a sale on HS Strut mouth calls this time of year. Stock up. I'm also fond of Quaker Boy.
Pot calls: Heirloom makes a bunch of nice ones, but I'm on the pro-staff of Heirloom, so I'm partial. I will say however that their Double Barrel and Over and Under calls are phenomenal.
One other thing: Get the Spittin' Feathers CD's . These have great live turkey sounds. I start riding with them in the truck this time of year . That will get the inner turkey going inside your head.