I 2nd
Gintama and
Pandora Hearts also
Katekyo Hitman Reborn its at 30+ vols I think, shounen fun for the first 7 vols then it gets good
Rurouni Kenshin is 28 and finished also one of the best manga ever. If you dont mind ecchi,
Sekirei is over a hundered chaps, good storyline, sadly tho on hiatus lots of times.
Trigun is 15 vols (I think) and complete.