Wow... I seriously didn't think I've owned as many devices as I have done. This is my personal list below excluding my work phones (which would add a Nokia 5140, Blackberry 8820 and 8900 to the list).
2002 - Nokia 3330
2003 - Motorola V600
2004 - Samsung E700
2005 - Sony Ericsson S700
2006 - Nokia N80
2006 - Sony Ericsson W950
2007 - Apple iPhone
2008 - Sony Ericsson W350
2008 - Apple iPhone 3G
2009 - Nokia N900
OK, lets see. It might not be the correct order, though:
Ericsson GH197
Nokia 2110
Nokia 6110
Nokia 8110
Sony CMDX-1000
Siemens S4
Siemens S25
Siemens S35
Siemens S45
Siemens S55
Siemens S65
Siemens S75
Siemens SX1
Dell Axmin X30
Benq-Siemens EF81
Nokia N95
Nokia N810
Nokia N95 8GB
Nokia E71
Nokia N97
Nokia N900
Texas Instruments TI-57
Sharp PC-1500
Nokia 9000i
Nokia 9110
Nokia 9210
Sony Ericsson P800
Nokia 9500
Nokia 770
Nokia N800
Nokia E90
Nokia N810
Nokia E51
Nokia N900
Nintendo GameBoy Pocket (First Edition)
Sega GameGear
Nokia 3310
Nokia 6310i
Some Siemens mobile phones
GamePark GP32
Tapwave Zodiacē
Nokia 6230i
Nokia N810
Nokia E51
Nokia E71
Nokia N900
errr,
first mobile was a phillips that looked like a house phone,
then a panasonic, don't know model numbers at this time.
first contract wasa nokia something or other,
then a sony ericson flip phone,
then back to nokia, the posh silver one
then the posh black one,
seimens sx01
sony ericsson walkman phone
nokia N95
nokia N95 8gb (insurance claim !!!)
apple iphone
iphone 3g
blackberry storm
and the best and current one nokia N900