I love 3D printing it allows me to be able to show an artistic side. My artistry skills are very low but 3D printing allows me the ability. I recently design and built a 5 foot warp core lamp/phone charging station I am very proud of, I used 123D design to design the whole thing. 123D design has been great for me to use. For geometric designs I think it is great, I love that I don't have to online to use it just open it up on my laptop and start designing when I get an idea in my head. It is put out by Autodesk and sadly they no longer support it. I had to download it from a second source they have moved on to Fusion 360 now which I know can do more things but it requires you to be online. 123D Design can be a little slow and crashy at times but I still feel it is an excellent tool. https://www.autodesk.com/solutions/123d-apps
I printed this on my Creality CR-10 https://creality.com/creality-cr-10-3d-printer-p00096p1html-p00096p1.html
I want to give a shout out to https://www.youtube.com/channel/UCsnKS1fVNJ1yjCkGOXXDd4A Frankly Built who has inspired me to try and print an Iron man suit and introduced me to this site with all these wonderful files.