That's very true. None of the vehicles really had the personality of the ones in the OOT. But then Lucas made the bizarre decision to make everything in the PT clean and new, going against the look that set Star Wars apart from other Sci-Fi movies that came before. I think the lack of personality goes hand in hand with that decision. The craft that we fell in love with felt like they weren't from a 1950s "visions of a utopian future", they felt like they were functional and had a relationship with their owners. Particularly with the Millennium Falcon, which looked like Han Solo had added to it countless times, making it faster and tougher. The two of them had grown together.