Started out with a carveboard back in 03. They are fun on moderate sloped hills but don't handle well at higher speeds and like a previous poster said, you need transpo to get back up hill. Can be fun but speed wobbles will get you killed, and they are very difficult to stop. I also feel that they are too heavy, but if you want a surfy feel it's the way to go.
Next I bought a loaded vanguard. Fun cruiser, carver, slides, does it all. You can skate around town or bomb hills. Not the best for hills but you can change the set-up to improve downhill performance.
Now, along with my vanguard I ride a Original Hybrid 35. Super fun board that rides a lot like a short board. It's really loose off the tail and you can mimick alot of what you do in surfing on the asphalt.
My favorite of the 3 is the vanguard. It's an all around board that does it all. You can walk, cruise, carve, slide, whatever you throw at it, it will handle.
Least favorite is the carveboard. Too heavy, too restrictive on what you can do.
My advice, go with an Original. They have several models to choose from and their customer service is great. Loaded skateboards are great, but I would wait until you've been riding for a minute before you invest in one of their models.