which series should I watch next?

Vote if you like:

Piano
Seems like a nice everyday life shoujo series about a 14 year old girl who plays piano, and whose musical expression is effected by the events of her life, and her interactions with the people around her. Particularly close to my heart as I am a pianist myself, so there may be a lot in the offering in this one.
Connections:
Directed by Norihiko Sudo, assistant director of the Ghibli film Only Yesterday, one of the few Ghiblis I actually like, and episode director of a few in Comic Party.
Art Director Junichi Higashi was also Art Director of Ai Yori Aoshi and Enishi, Cowboy Bebop, Mahoraba and Excel Saga which are all big plusses.
Hmmm – not too bad, but then watching a series by staff you wouldn’t usually come across can sometimes be refreshing and rewarding… when it isn’t disappointing…

The Melancholy of Haruhi Suzumiya
An extremely popular anime in Japan and the states, this also seems to be an everyday life series, but the ‘psychological’ and ‘supernatural’ genres that appear over at Anime News Network’s description of it have me worried. The series’ popularity has me interested, but those two elements raise alarm-bells in me for the posibilities of cheap narrative points.
Connections:
Series Director Hiroshi Yamamoto, episode director of three eps in Air and two eps in Fumoffu which both speak fairly highly of him, backed up by the standard Director Tatsuya Ishihara who worked on the same projects. Ishihara is also directing the remake of Kanon.
This series has a lot going for it, it may be a tough decision…

Paradise Kiss
Another high-school series, this one about a girl who joins an ‘eccentric’ fashion-designing club. It’s also supposed to be shoujo/everyday life themed, so the jury may be out between this and Piano. I’m sure the myriad of characters in this will provide plenty of comic opportunity which will make it quite different from what I imagine to be a more sobre Piano. I don’t really know which one I feel like more to be honest.
Connections:
Seiyuu-turned-director/writer/art designer Osamu Kobayashi has worked on many popular series, none of which rate in my tastes, however he does seem to be quite talented.
The original manga was created by Ai Yazawa, also the creator of Nana which I have scheduled to obtain and watch. She seems to be an established writer of shoujo which I suppose could make the themes either really fantastic or really dull. Mind you, almost all of the anime written by or sourced from material written by women has been absolutely brilliat, so this is a big plus for me.
While this is an adaption, the fact that Kobayashi wrote the screenplay adaption, directed the series and wrote the script for the series speaks highly of the production. While it’s not always innevitable, sometimes directors who haven’t written the screenplay aren’t able to make good on the core themes and atmospheres of the production.

A very tough decision indeed.
Piano will probably be the quietest of the three, Melancholy of Suzumiya will most likely contain the most popular themes and has the most potential for over-worn cliches, and Paradise seems like the more mature production with what appears to be an older cast of characters and solid source material.

The question is, which do I watch first?