Yes! You get circa 4.5 AGS for every PTS you donate at the moment. So if you want a long term stake, it's the best value in my opinion.

I think the most people's favourite is BitShares DNS, this whole new web domain system. http://vimeo.com/user24356268/review/89219239/9a45e730ca

My favourite though, is BitShares Music, the guy they've got developing the main front centralised end, Eddie Corral is great, lots of experience & connections in the music industry and a lot of passion.

So you'll be able to buy shares in artists and songs and get a % of their sales. But for me the real potential is with record labels, who can use it as a way to give fans ownership of their favourite artists and give them a real incentive to go out and share and promote their music.
The best part is, that if it's offered by a record label, you can potentially buy shares in the whole revenue of artist, like all album sales, concerts, etc. That will be huge, imagine Hollywood Stock Exchange for real and for music, with fans buying shares in the next JayZ song or album. The future of this industry is massive. Some other guys like Counterparty are experimenting with selling shares in artists too but they just won't have the full service company that BitShares Music is developing with Eddie Corral.

The other one is BitShares Gaming, some people say it's the big sleeper. Lots of development going on.

Lotteries alone are a $250 Billion+ per annum industry but over half of the price you pay on a lottery ticket goes to government, ticket vendors and administration, plus they're generally restricted by borders. So there's a big opportunity for a well done blockchain, (Which is obviously borderless) based lottery system to undercut the industry there. 5 years from now I can see there being a weekly world lottery 

Big opportunities in a lot of areas so I'm definitely excited about the future DAC's. Of course the big question is whether BitShares will become market leader in some of these areas. IMO they're far ahead with having thought about these things, got the development funding and developing the technology etc., so they look the best placed out there at the moment.

Once DPOS is up and running which forms the base of their blockchains I think the pace of development is going to take a lot of people by surprise, so much stuff waiting in the wings right now.