I've done a few that I love, and a few that I hate

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I've said this before, but I think your work is so good that I wish Paramount would have contacted you to ask if they could film some of your models as background ships in episodes of TNG and DS9.
I get why the TV shows have used quick kitbash models sometimes, but they've never looked as good as the ships that have been through a proper design process.
The two instances in TNG and DS9 where they used kitbashes had two entirely different backgrounds.
For BoBW, the five models built from AMT kits were originally study models built by a professional model maker (Ed Miarecki) in an effort to convince the TNG producers that other filming models could be constructed using the Ent-D molds. The idea was that they wanted to stop using the TOS movie models as guest ships and start creating new ones more contemporary to the Ent-D, and these five studies would be the basis for new, more detailed shooting models. None of the studies were ever meant to actually be shown on screen, but when they needed some quick cheap models to battle-damage for BoBW, they had them lying around, so they used them.
For DS9, it was a completely different scenario. They had to show a battle-damaged fleet, and unlike BoBW, they had nothing lying around they could use, or any professional model makers to build pre-damaged filming models. So the art departments from DS9 and VOY just hastily threw together a bunch of model kit parts in out-of-scale configurations so that they didn't resemble ships they were already using. Unlike Miarecki's models, these kitbashes were not meant to be taken at all seriously and were never meant to be more than little blobs in the far background.
To my eye, the Yeager was the kitbash that was worst. The shape almost worked, but underneath the saucer they kind of kept the nose section of the original Juday class, (I think that's what it was called), and to me that's what made it look like it was just two models glued together. Plus the saucer was a typical smooth Starfleet hull, while the Juday was heavily greebled, and they just didn't fit together. If they had made a new ship with that same basic shape but with more consistent styling, I think it might have looked pretty cool actually.
I get the feeling that the Yeager was meant as an in-joke. It was first seen in the DS9 episode with Robert Picardo, so I think Gary Hutzel had a little fun by showing this ridiculous kitbash made from VOY ship parts to emphasize a VOY actor showing up on DS9.
The Constellation has a nice overall shape, but WAY too many greeblies. In the Trek universe, I'm a fan of smoother ships without a lot of dressing. I think it was just nuts to glue a couple of Enterprise pylons and some robots on the hull, and those bigass lumps on the bottom look like a bad case of lipomae.
Remember that Greg Jein was just basing his larger filming model on the smaller yellow kitbash Rick Sternbach made for TNG season 1. That small yellow model wasn't even originally supposed to be the Stargazer, but when Jein built his new model, he used it as a reference. There was never supposed to be a 'Constellation' class, as the Stargazer was supposed to be a reuse of the movie TMP Enterprise.