Nope. You almost certainly don't need one.
1."SSD boots my OS/Apps in seconds"= They reboot/start the same apps uncached several times per day
2."It reduces my compile times N times"=They don't have enough RAM to cache the files
3."They don't have any noise"=They typically have a noisy fan or ancient HDD model
4."Its power efficient"=Only on battery powered computers and the difference is not that significant( see
http://www.tomshardware.com/charts/2012-mobile-hdd-charts/-20-Power-Requirement-at-Database,3003.html ).
5."Its more reliable"=SSD will suddenly die without any warning. They are sensitive to power loss. Data on them is very hard to recover in case of failure. They have limited write cycle, after which they are useless. They are shock-resistant and more durable, but do you drop your harddrives often?
6."The speed is always worth it"=These applications are better served with a RAMdrive or RAM-based storage. If its worth it, RAM is always faster.
7."They are more compact and light weight"=Only relevant for mobile computing, and guess what these additional 100 grams are not that hard to carry(and HDD can be compact:
http://www.seagate.com/internal-hard-drives/laptop-hard-drives/laptop-ultrathin-hdd/ 5mm-thin, 3.3 oz(93grams)).