Top 10 Worst Water Levels, hmm. *looks at subforum name* I musta missed that one in the theaters...
Since everyone's talking about it though, i guess I'll add in that as far as water levels go, Hydrocity in Sonic 3, Aquatic Ruin Zone in Sonic 2, and level 2 I think in Ristar are probably the only good water levels I've played. One of the most annoying ones I remember was in Crash Bandicoot 3. Last thing that series needed was a water level, but they obviously needed to come up with something new I guess.