Rad!
It's like a Jaeger from pacific rim constructed to be Vegeta.
I have head cannoned, that if vegeta need to pilot the mech, he is only drift compatible with other Saiyans, and complains about it endlessly (except trunks.)
In terms of the design, I really like the antenna at the top of the crest, and the marine feel of the wedge head.
You also used the rain quite well, though to give it a little extra flair, maybe mess with some exhaust stream?
All the style of smoking, but you can choose the exhaust port.
Final thought is I really appreciate your notes on the profile, head on, and 3/4, it gives a great sense of how you build the depth.
Thank you for making this.