Self upgraded Delta
Well if you want to study all difficulties of 3D printing go for Delta kinematics.
Hard to calibrate, difficult to print flexible materials, printable area much smaller then the bed, might have distortions near to the edges of print area.
For a newbie I would suggest Decart kinematics, it is more straight forward in many things.
But to have more fun and have these exciting triangles working go for Delta!