Thats okay. I too love me some fas paced action. Infact I often got frustrated and annoyed at the stealth in games like Uncharted and Killzone! Infact sometimes I still do.
I knew that coming into Metal Gear Solid would be hard for me. I mean Resistance: Fall of Man was a huge challenge as my first FPS, LBP was a huge challenge as my first side-scolling platformer, and Uncharted was a huge challenge as my fist cover-based shooter. Luckily at the time I got MGS I was so bored and ready for a new game, I didn't care if it was bad or not. So I had time to get really settled with the new genre.
To ne honest, I too can find the pace slow an difficult to jump into quite often nowadays. Especially with fast paced games like Metal Gear Rising, Fuse and Rayman. But I know that when the time comes for MGSV, I will be ready.