Now, now...let's keep the "loser" talk low. The man asked a rational question; let's not start another "My choice is better than yours" flame fest.
On the subject: polymer frames have different properties than steel frames, some of which are more desirable for a carry gun. Steel frames have other advantages, though. It all depends on what you are looking for in a gun. "Better" is a tricky term: better for what?
In general, polymer frames are much lighter, totally resistant to corrosion, and cheaper to manufacture than steel frames. Polymer frames also have a recoil-mitigating function in some guns, since the poly frames flex under recoil and absorb some of the recoil energy. Polymer is also unaffected by temperature transitions and is generally more pleasant to carry next to your skin in extreme high or low temperatures.
Steel frames have more tensile strength, can be refinished and modified easier than polymer frames, and are generally more adaptable to a user's hands since most steel-framed guns offer replaceable grip panels. Steel guns usually weigh more than polymer pistols, which can be an asset if you want to keep the recoil low. Lastly, steel frames have proven their durability for hundreds of years now, while polymer is a newcomer and has yet to prove its long-term durability. The oldest polymer frames on the market are the first-generation Glocks imported in the mid-1980s. so there are some polymer guns out there that have seen almost twenty years of use, but they are no beauty queens at that age and usually have had more than one factory rebuild.
Steel and polymer both have their place in handgun design, because they offer different properties. Neither is "better" than the other any more than a graphite golf club is "better" than a steel one. Each comes with advantages and trade-offs, since "there ain't no such thing as a free lunch".
