I made a couple batches of takoyaki the other night and I must say that I am getting pretty good at it, IMHO. The first batch didn't look so great (they weren't perfectly round), but my second batch was much better. They were almost uniformly round, with just a few that had some spaces. The good thing about takoyaki is that in the end, you cover them with okonomiyaki sauce, mayo, katsuo and the green stuff, so you can't really see any imperfections. For the record, we didn't actually use tako this time. The first batch had sliced hot dog in it, and the second had cheddar cheese cubes, which really make great takoyaki.