domain db servers (dot) net and 5 more please appraise

[JonathanDomainer]

Hi guys I want to become a pro domainer like you! I started yesterday by registering the following domain names:

DB SERVERS (dot) NET (stands for database servers, the .com is for sale at $4,288)
CHEAP LINUX VPS (dot) NET
DINO VPS (dot) NET
ADMIN TALK (dot) NET (the .com is for sale at $2,988)
HW TALK (dot) NET (stands for hardware talk, maybe a community about hardware?)
SW TALK (dot) NET (stands for software talk, maybe a community about software?)

What do you think about my domains? Is this a good start? How can I improve?

Thanks!