I'm really sick of changes to the status quo and the constant cycle of crossover/aftermath/lead-in-to-next-crossover that Marvel's been stuck in for years.
I'm a diehard X-Men fan but it was status-quo changes that made me stop collecting those comics back in 1998. One too many. They won me back but while I understand why they do it (events/reboots sell comics) it annoys me.
House of M was alright story (but one that had been done before) and Decimation was a disaster (and a story done before!). I'm glad that the X-Men have mostly been left out of Secret Invasion since the X-Men did that story 100 issues ago anyway.