I can relate. I have played a year at 25 Nl and I am currently
making 800-1000 month if I can do bonuses as well.

I am currently making transition to 50 NL but the funny thing
is that I think the risk/reward ratio is much worse than in
25 Nl.

If currently I play at 25 NL tables I can find player on flop%
near 50 and average pot is over 10 dollars.

At 50 NL average pot is only 13-15 dollars but games are much
tightier 33-36%.

So it seems hard to find a reason to move up except your own
development as a poker player...