This is not a thread to start a fight or anything, not here to say one phone is better than the other. I figure most of you don't actually have the phone yet, it might be useful if I shared a little of my experience with the other huge phone (size wise) on the market.
First off, the EVO fits comfortably in my pocket, no problems there. I wear normal jeans (or slacks to work) so I imagine the Droid X shouldn't cause a problem (I believe the X is slightly taller, and the Evo is a tad wider, not sure). One thing to bear in mind is that you may want to keep the phone in the pocket by itself. There has been a time when my phone fell sideways in my pocket, and it took a little manuevering to get it out. Nothing crazy, but if its sideways in my pocket, and something else is in my pocket too, it took a little longer to finagle the phone out than when it was sideways in my pocket alone. Overall though, I can't say the size of the Evo caused any real problems.
I'm not a big fan of cases, but I did get one for the Evo, only because the lens protrudes a little. The case is just thick enough to where if I lay the phone flat on its back, the lens doesn't touch the table. I know the back of the X is different, and unique in its own way, so this may not apply. However, if you are worried about adding bulk to an already large phone, I would say its okay. I've had the case on since the beginning, and as I said above, I don't think the size is a problem.
Last thing about the size. While sometimes I need to adjust the way I hold the phone, I can reach all the buttons fine. With other phones, I was more inclined to hold the phone closer to the bottom, but with the Evo, I hold it closer to the top or center. After a few days, it sort of felt natural, not as though I had to actually think about the best way to hold the phone. As for may hands, I'd say they aren't real big. I can palm a basketball, but only for about half a second. Obviously tiny hands and phones like this won't mix well, but I don't think you need banana fingers to work the phone.
With different manufacturers, different skins, and different carriers, I suppose size is the only real comparison to make between these phones. And unless you're coming from an HD2, or an Evo, its unlikely you have used a phone of this size, so hopefully this helped you a little bit.
Enjoy the phone when you get it!
First off, the EVO fits comfortably in my pocket, no problems there. I wear normal jeans (or slacks to work) so I imagine the Droid X shouldn't cause a problem (I believe the X is slightly taller, and the Evo is a tad wider, not sure). One thing to bear in mind is that you may want to keep the phone in the pocket by itself. There has been a time when my phone fell sideways in my pocket, and it took a little manuevering to get it out. Nothing crazy, but if its sideways in my pocket, and something else is in my pocket too, it took a little longer to finagle the phone out than when it was sideways in my pocket alone. Overall though, I can't say the size of the Evo caused any real problems.
I'm not a big fan of cases, but I did get one for the Evo, only because the lens protrudes a little. The case is just thick enough to where if I lay the phone flat on its back, the lens doesn't touch the table. I know the back of the X is different, and unique in its own way, so this may not apply. However, if you are worried about adding bulk to an already large phone, I would say its okay. I've had the case on since the beginning, and as I said above, I don't think the size is a problem.
Last thing about the size. While sometimes I need to adjust the way I hold the phone, I can reach all the buttons fine. With other phones, I was more inclined to hold the phone closer to the bottom, but with the Evo, I hold it closer to the top or center. After a few days, it sort of felt natural, not as though I had to actually think about the best way to hold the phone. As for may hands, I'd say they aren't real big. I can palm a basketball, but only for about half a second. Obviously tiny hands and phones like this won't mix well, but I don't think you need banana fingers to work the phone.
With different manufacturers, different skins, and different carriers, I suppose size is the only real comparison to make between these phones. And unless you're coming from an HD2, or an Evo, its unlikely you have used a phone of this size, so hopefully this helped you a little bit.
Enjoy the phone when you get it!