I have a vertical bandsaw, a abrasive chop saw, a horizontal power hacksaw, plasma cutter and big guillotine (we need a forklift to move it...)
It depends on what your cutting and the situation, aluminium I tend to do on the bandsaw because its set up for that rather than steel, tube or barstock on the abrasive when I can do it outside (it throws a lot of spoil out, so dont bank on using one where your lathe is kept), power hacksaw for big stuff and hand hacksaw for stuff I just need to whip down to size quick as it sits on a beam above the vice. The abrasive cutoff saw sits on top of a portable trolley what the smaller welders live on, so tends to be used for tube fabrication jobs as its to hand.
The evolution fury 2 cutoff saws have quite a following, they cold cut and the result is supposed to be much cleaner than with an abrasive chop saw, Ive never used one first hand to comment but read a lot of raving about them. Occasionally theyre to be found in aldi's at a bargain price in the uk...