Remember ticket field value for each user

[phpxcache@…]

when someone is testing a specified component, he/she is more probably to be testing the same component/version again instead of the "default" one set by trac admin. it would be nice if some fields can be rememberd on a per-user basic

i have the following simple design which please both admins and users

1. configurable in admin
   1. default value for each ticket field
   2. should remember on per-user basic OR force to use admin default
2. for each per-user-remembered ticket field
   1. save current "admin defalut" as "last admin default"
   2. save last value on ticket submit, this value is discarded if the above value does not match the current "admin default" (which means the admin changed the default value)

any idea?