Lack of built-in flash on OM-D annoying or frustrating?

I came from a GF1. I have tried out my brother's G3 though. The E-M5 LCD and EVF are noticeably nicer... Especially the LCD. The E-M5 also feels like a higher quality cam, but the G3 Probably wins for ergonomics... Although I do like the e-m5 shape just fine... Even without the battery grip. The image quality isn't as much of an upgrade from the g3 as from the gf1. The frame rate of the e-m5 is scary fast. I almost never use the 9fps setting, but I do use the slower 4 or 5 fps setting regularly.

IBIS is handy... Especially with unstabilized telephotos like my adapted 90mm f/2.8 macro and the Oly 45mm f/1.8. For video it's amazing... Much better than O.I.S. for handheld video.Not shaky at all.

Seems like better auto WB than my GF1, but like all digital cams it struggles to get it right with indoor mixed lighting.

I think this would annoy me more than the lack of on-board flash. The E-M5's limited tilting LCD is of little use when shooting portrait orientation, and as you know it can't swivel to the front.

This doesn't really bother me. When I want flash I would rather use a flashgun I can bounce. The little FL300R isn't very powerful, but it is handy. I almost never use the clip-on flash that came with the camera. the FL300R is just as easy to carry. I almost never used the built in flash on my DSLR cameras either. I think the only time i use the clip-on flash is for triggering wireless remote flashes

Sean