Your Entries #20, #17, and #18 are fun. I'm fond of that typeface and have used it often. The character that throws me off every time is the "s". It seems to create an odd separation between the letters on either side. In this case the "p" and the "i".
The infinity symbol of the oo's is great! Love how you have a drop shadow to give depth. Well done!
I'm most fond of the simplicity and type face of #42. Actually quite a bit...
I've got a couple suggestions if you're game. A lower case "b" that looks just like the "p". Maybe even the "p" flipped vertically and used as the "b".
Also, after looking at your logos for a while, my eye keeps focusing in on "Boop" because of the coloration. How about keeping all letters the same color (maybe green) then the "i" the accent color, but the dot of the eye another color. Just like you have the red dot on #42. Great touch man! Great, yet simple touch.