I honestly prefer LH's 4-abreast planes to 6-abreast ones. It may sound strange having in mind the cabin size, but I feel more comfortable being blocked by one instead of two persons (window seat fanatic here) and the atmosphere is cosier and more welcoming in a way. Plus, for whatever reason, my hearing is always much less impaired in CRJs than A320s - could be a coincidence. That's why I always try to connect via MUC (CityLine) rather than FRA when departing from BEG.