Hey welcome to the boards. Here's the obligatory warning:
WARNING: Seibertron.com contains nuts! 
The Open vs. MISB debate turns up every once in a good while and while the opinions and motives vary from collector to collector, there is some form of consensus. In my case, I open everything to fully enjoy the toy within, however I do keep the packaging whenever possible. That depends on the kind:
Pre-RiD: loose or MIB only, if possible. Intact
Post-BM US cards and boxes: keeping the other package and inserts, toss the bubble.
Japanese cards and boxes: everything intact
I still have a sense of collector's value, and i'd hate to diminish it in any way
The resident Rewind... well, half of one

- Jelze Bunnycat =:3
Looking for:
- TR Furos (Hardhead's head) and Crashbash (lost him

)
- PotP Punch head
- TR Galvatron right arm (the gun one)
- CW Brake-Neck/UW Wildrider, CW Offroad
- TR Twinferno & Grotusque
- Greenlight, Lancer and PotP Elita-1
- Legacy Core Slug, Sludge & Snarl