Oh, where to begin?
Welcome! It's really great hobby and Pinside is certainly a fun part of it. As someone who is relatively new to the hobby and Pinside myself here a few things I have learned over the last couple of years that might be helpful:
(1) It's addictive. Particularly the drama threads. They're like watching a snake eat a goat: excruciating, but you can't stop watching.
(2) The hobby is bigger than Pinside and Pinside is bigger than the people you see posting all the time.
(3) How good a game is is VERY subjective.
(4) The prices are too high.
(5) People will keep paying these prices anyway.
(6) Your opinion is empirically wrong to everyone and everyone has selected one individual to inform you that over and over again on this forum.
(7) Even though it may not make logical sense, repeating your opinion over and over again ABSOLUTELY WILL make it more valid, regardless of what other people on the forum have to say.
(8) Stern sucks.
(9) Stern is awesome.
(10) JJP sucks.
(11) JJP is awesome.
(12) You are probably Kaneda.