Re: vase size does it matter
I think it matters 100%. A bigger base allows you more room for ice and water. My base is so small that I have trouble fitting enough ice in. Also, Bigger vases are more stable.
To my experience, Bigger vases allow for smoke, however my MYA QT produces pretty dense smoke, and as long as im smoking normally and not crushing the hookah, I get the smoke I want. I would assume a larger vase would allow more room for smoke to be stored, and it would be pretty dense if your valves and connections are tight.