I’ve tried different types of steel, and I feel there are better options than commonly available in a big box blister pack. They are more expensive, but a custom knife is well worth the price.
Tool Steels: These steels are not stainless, they will tarnish and rust if not kept oiled, and well cared for, but make really great knives,
O-1: This is a great oil hardening steel, fairly easy to sharpen to a keen edge. Randall, in Florida uses this steel. This is my primary tool steel
D2: D2 has a relatively high chromium content, and might be considered stain resistant.
440C: This is a very common steel in production knives, commonly purchased in a blister pack, but I never liked the feel of this steel when using a knife. Until you use a fine blade in another steel, you don’t know what a big broad world of steel there is out there.
154CM: A great steel, very similar to ATS-34. This is my primary choice for stainless blades.