So, after reading some of he answers here i am kind of shocked.
You see, i came to the hobby because i like the modells. Mainly Space Marines. Since i dont really like on chapter "best" i planned [and am quite far alreaddy] to build a force normally played after vanilla rules, but consisting of different chapters, normally an HQ or special character with an attachement of marines. I.e.: Shrike [build from the captain modell from FW] and Vanguards in Raven Guard collors, a core of tactical/sternguard/devastators in Crimson Fist collors led by Pedro, Swordbreathren Terminators etc.
They are based fitting to each other and all are quite well painted, some far better.
Like i said, normally they shall be played as Vanilla Marines, all wysiwyg. But i might also try to use another codex now and then, IF i can get them on the table wysiwyg.
So, that would be a problem for some?