I'm not sure what kind of collecting you are interested in. If you're like me and are buying with the intention of carrying and using them, I have a suggestion to make. Now that you have a nice selection, hold off buying any more for a while. Spend some time carrying and using the ones you already bought. It's easy to get into a buying frenzy when you first start out, so I recommend taking it slowly so that you don't go broke, get burned out, or find yourself with a ton of inexpensive knives that you don't use instead of having spent the same amount on a smaller number of higher quality knives that you would actually get some enjoyment out of.
Now if you are into the collecting for display aspect of the hobby, that's a different thing, so,the above advice may not apply.
Also, spend some time reading through the Maintenance, Tinkering, and Embellishment section of the forum here and learn about sharpening and knife care. There's plenty of good knowledge there and things that you'll need to know to keep your knives sharp and pretty.