Handles, eh, what feels good....
STEEL, now that's IMPORTANT. Check to see where it was made. If made in China... not so good.
Go to estate sales, barn sales, ebay, look for a good edge, secure handles and personally, I prefer a slightly curved blade. Straight blades seem to 'catch' when I use them. Also, look for a blade that has a good bevel because it will be much easier to sharpen on your stone.
The best one I have is one that I 'borrowed' from my dad about 25 years ago (and he got it at a garage sale - perfect curve and great steel ).