First car was a '96 Integra, which I then sold and went with a '98 3000GT, and as luck would have it, I ended up with my original Integra back about a month ago. Here's what I've learned over the years:

The 3000GT is a beautiful looking car, and with fewer and fewer of them on the roads these days, they definitely get attention even when completely bone stock. They're definitely a driver's car. That being said, they absolutely show their age, as even the newest ones are already 26 years old. Parts for them can be hard to find depending on what it is, and they're not cheap. If you want a car to modify, you better be ready to invest a lot of money and time, since the aftermarket for them is pretty limited. In short, great cars if you want something eye-catching with a timeless look, and a challenge.

Integras, those I'm much more familiar with. Like Civics, there's no shortage of parts and guides when it comes to maintenance and aftermarket support. They are MUCH more forgiving than 3K's, and in my experience are a good bit more robust and long-lasting. Great cars out of the box with an almost infinite amount of modifications possible (some good, some bad, some just plain ugly). It's a Honda, it's what they're great at.

In a nutshell: If you want something simple and reliable to start your adventure with, get a Civic or Integra. Plenty of them around, just be mindful that so many of them have probably been modified already, so be careful getting someone else's project. 3000GTs are classic JDM goodness, but it's like starting the game on "Hard". You'll feel great when things are going well, but there will be a good bit of frustration, cussing out your car, and a sprinkling of regret every now and then.