I don't like the emissions of the old 2 stroke engines, but we have a 4 hp 2-stroke outboard, a 9.9 2-stroke outboard and a 9.9 4-stroke Mercury outboard. I would trade the finickiness of the Mercury 4-stroke in a minute for a simple, reliable 2-stroke. Maybe we have a lemon, but we never know if the 4-stroke is going to decide if it wants to start. Sometimes it want the choke, other times it doesn't... sometimes it starts easily when warm, other times it won't. My wife and daughter won't use it anymore because it's so hard to get started sometimes. I usually can get it started, but sometimes it gives me trouble, too. We never have those issues with a 2-stroke.
I like the cleaner emissions of a 4-stroke and freedom from having to mix oil and gas, but every 2-stroke we have ever owned has been pretty much bulletproof.