Not quite building tip: Building in units of 1.6 or 2.4, not 2
I'm not pretending to be a great ship designer, I'm really not. But I do think this might work wonders for some of you who are looking more into the building aspect of this game.
Avorion's default scale and grid sizes are set to 0.25. This is fine if you're mostly building crafts with 2+m blocks, but you lose a lot of flexibility when it comes to greebling or making ships with wonky geometry, simply because 10 doesn't divide into smaller integers all that well. If you mainly go for builds that involve a lot of halving, using 1.6 as your base unit is great because you can halve your blocks 5 times (1.6 -> 0.8 -> 0.4 -> 0.2 -> 0.1 -> 0.05) before you hit the decimal place limit. If you use a lot of halves and thirds, you can build in 2.4 with 0.15 increments or 0.2 increments to get a ton of different block sizes.
Red: 2-tall blocks at 0.25 intervals, blue: 2.4-tall blocks at 0.15 and 0.2 intervals each
This works well for breaking up surfaces too, as you have more options in cutting up a 1.2m wide surface as opposed to a 1m surface into neat proportions. One downside is that scaling up builds might be a bit trickier (2.4 -> 4.8 -> 9.6 -> 19.2 instead of 2 -> 4 -> 8 -> 16) but this is an inconvenience I'm willing to take, if this isn't your cup of tea totally understandable.