Stamp Crazed!

I have been playing with different pieces of "gasket" material as bases for stamps.  HRH brought home three different types of gasket material.  Only one, the first ever carved stamp from last post, I really like.  It is about 1/4 inch thick black and carves like a dream.  A red piece is already embossed with tiny little polka dots that show up when I stamp.  It is okay, not bad to carve but a bit flimsy and is like 1/8 in thick.  The third piece was black rubber only 1/8 in thick and seems a bit doughy which made it harder to carve for me.  Today, he brought me a piece of something I have no idea what it is.  IT has fabric webbing on one side, and is about 1/4 in thick.  We are trying to decide if it is cork or leather.  It carves easily, I like that.  It does not carve edges as smoothly as the first 1/4 in piece of black rubber.  It is just fun to see what you can carve on.  I dug out all my carving tools.  I have like about 30+ knives (is that what you call them?)  I have one that I like... the rest went back into their resting place.  Then I dug another one out to make the edge on the "eye" stamp.  These are not professional looking, but I love them as they are my creations, mine all mine!  LOL

Top on red gasket, petroglyph figures

Middle left on 1/8 black gasket (one must do a face, right?), right on red gasket

Signature on black 1/4 in gasket

These are all on the leather/cork material

A frame, a pertroglyph, and of course I have to have an eye!

Now that I know what I know, I don't think I will be doing more unless I need a special "stamp" for a special reason.  I just needed to try this to see how one goes about carving stamps.  Have you done this? Any tips for me?